> ## Documentation Index > Fetch the complete documentation index at: https://ramps-09-25-periodic-statements-spec.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # List balance changes for a period > Every change to this account's balance in a window, in the order the money moved, with the opening and closing balances for that window in the same response. This is the statement feed. `GET /transactions` returns one row per transaction. This returns one row per change to the balance, and a transaction that moves the balance more than once produces more than one change: an ACH deposit and its later return are two, and a card purchase that clears in two parts is two. Each change's `transactionId` names its transaction, so fetch it from `GET /transactions/{transactionId}` for the type, counterparty and merchant a statement line shows. **The identity to assert:** `openingBalance + Σ(data[].amount) == closingBalance`, summed over every page. The opening and closing balances describe the window rather than the page, so they are the same on every page. Page until `hasMore` is false, then assert the identity before rendering a statement. `from` and `to` are instants and the window is half-open: a change at exactly `to` belongs to the next window. Consecutive periods therefore tile with no gap and no overlap. For a monthly statement, pass the first instant of the month and the first instant of the following month, both in US Central time (`America/Chicago`). Grid records a statement as fetched only for a window that is exactly one such month. A window whose card settlement has not closed is refused with `409 NOT_YET_AVAILABLE`, because its figures could still change. Retry once it has settled. **Fees are inside the changes.** A fee Grid charges comes out of the balance, so it is already in `amount`: inside a send's change, or a change of its own for a withdrawal's fee. Each change's `fee` says how much of its `amount` was a fee, negative when charged and positive when refunded. To show a fee as its own statement line, split the change into `amount - fee` and `fee`. Never add `fee` on top of `amount`, or the identity stops holding. Card transactions carry no Grid fee. Merchant, counterparty and rail detail live on the transaction; read them from `GET /transactions`. ## OpenAPI ````yaml /openapi.yaml get /internal-accounts/{id}/balance-changes openapi: 3.1.0 info: title: Grid API description: > API for managing global payments on the open Money Grid. Built by Lightspark. See the full documentation at https://docs.lightspark.com/. version: '2025-10-13' contact: name: Lightspark Support email: support@lightspark.com license: name: Proprietary url: https://lightspark.com/terms servers: - url: https://api.lightspark.com/grid/2025-10-13 description: Production server security: - BasicAuth: [] - AgentAuth: [] tags: - name: Platform Configuration description: >- Platform configuration endpoints for managing global settings. You can also configure these settings in the Grid dashboard. - name: Customers description: >- Customer management endpoints for creating and updating customer information - name: Contact Verification description: >- Endpoints for verifying a customer's email and phone via one-time codes. Required only for customers whose payment provider mandates contact verification (e.g. EU customers); other providers return 409. - name: Strong Customer Authentication description: >- Endpoints for authorizing money-movement operations that require Strong Customer Authentication. Relevant only for customers in a region where SCA is required (e.g. EU); customers outside SCA-regulated regions never see an SCA challenge and these endpoints return 409. - name: KYC/KYB Verifications description: >- Endpoints for Know Your Customer (KYC) and Know Your Business (KYB) verification, including managing beneficial owners and triggering verification for customers. - name: Documents description: >- Endpoints for uploading and managing verification documents for customers and beneficial owners. Supports KYC and KYB document requirements. - name: Internal Accounts description: >- Internal account management endpoints for creating and managing internal accounts - name: Periodic Statements description: > Build, deliver, and evidence a Regulation E periodic statement for a customer's internal account. A statement period is a calendar month in US Central time (`America/Chicago`). A statement is issued for each customer's own USD internal account and covers their whole balance. Money received through a rule-based account appears on its owner's statement; rule-based, bulk settlement and platform-owned accounts have no statement of their own. **1. The statement — `GET /internal-accounts/{id}/balance-changes?from=&to=`** One row per change to the balance, in the order the money moved, with the opening and closing balances for the window in the same response. Page until `hasMore` is false, then assert this identity across every page before you render anything: ``` openingBalance + Σ(data[].amount) == closingBalance ``` If it does not hold, do not send the statement; contact support instead. `from` and `to` bound a half-open window `[from, to)`: for a monthly statement, pass the first instant of the month and the first instant of the following month, both in US Central time (for August 2026, `2026-08-01T00:00:00-05:00` and `2026-09-01T00:00:00-05:00`). Grid records a statement as fetched only for a window that is exactly one such month. **2. The receipt — `POST /internal-accounts/{id}/statement-confirmations`** Once a month, after you have pulled and issued a period's statement, send a receipt with the `periodStart` it covers. Grid stores it as the delivery record for that account and period. Sending it again is harmless: the first receipt's time is kept. **Timing** A window whose card settlement has not closed is refused with `409 NOT_YET_AVAILABLE` rather than answered with figures that could still change; retry once it has settled. - name: External Accounts description: >- External account management endpoints for creating and managing external bank accounts - name: Same-Currency Transfers description: >- Deprecated endpoints for transferring funds between internal and external accounts with the same currency. Use the quote endpoints under Cross-Currency Transfers instead, which now serve same-currency transfers as well. - name: Cross-Currency Transfers description: >- Endpoints for creating and confirming quotes for transfers, both same-currency and cross-currency - name: Transactions description: Endpoints for retrieving transaction information - name: Webhooks description: Webhook endpoints and configuration for receiving notifications - name: Invitations description: Endpoints for creating, claiming and managing UMA invitations - name: Sandbox description: Endpoints to trigger test cases in sandbox - name: API Tokens description: Endpoints to programmatically manage API tokens - name: Exchange Rates description: >- Endpoints for retrieving cached foreign exchange rates. Rates are cached for approximately 5 minutes and include platform-specific fees. - name: Discoveries description: >- Endpoints for discovering available payment rails, banks, and providers for a given country and currency corridor. - name: Embedded Wallet Auth description: >- Endpoints for registering and verifying end-user authentication credentials (email OTP, OAuth, passkey) used to sign Embedded Wallet actions. - name: Agent Management description: >- Endpoints for creating and managing agents (experimental), called by the partner's backend using platform credentials. Covers the full agent lifecycle: creation, policy configuration, pausing, deletion, the device code installation flow, and approving or rejecting transactions initiated by agents. - name: Agent Operations description: >- Endpoints called by the agent itself using its own credentials (obtained via device code redemption). Scoped to the agent's associated customer — all requests automatically operate on behalf of that customer and are subject to the agent's policy. When an action requires approval, the resulting transaction enters a pending state and must be approved by the platform via `POST /transactions/{transactionId}/approve`. - name: Cards description: >- Card management endpoints. Issue debit cards against an internal account, freeze / unfreeze, close, manage a card's funding source, and list card transactions. - name: Stablecoins description: >- Stablecoin issuance endpoints. Link provider accounts, register provider-created stablecoins, create direct mint/burn issuer operations, and track operation status. paths: /internal-accounts/{id}/balance-changes: parameters: - name: id in: path description: The id of the internal account to list balance changes for. required: true schema: type: string example: InternalAccount:019542f5-b3e7-1d02-0000-000000000002 get: tags: - Periodic Statements summary: List balance changes for a period description: > Every change to this account's balance in a window, in the order the money moved, with the opening and closing balances for that window in the same response. This is the statement feed. `GET /transactions` returns one row per transaction. This returns one row per change to the balance, and a transaction that moves the balance more than once produces more than one change: an ACH deposit and its later return are two, and a card purchase that clears in two parts is two. Each change's `transactionId` names its transaction, so fetch it from `GET /transactions/{transactionId}` for the type, counterparty and merchant a statement line shows. **The identity to assert:** `openingBalance + Σ(data[].amount) == closingBalance`, summed over every page. The opening and closing balances describe the window rather than the page, so they are the same on every page. Page until `hasMore` is false, then assert the identity before rendering a statement. `from` and `to` are instants and the window is half-open: a change at exactly `to` belongs to the next window. Consecutive periods therefore tile with no gap and no overlap. For a monthly statement, pass the first instant of the month and the first instant of the following month, both in US Central time (`America/Chicago`). Grid records a statement as fetched only for a window that is exactly one such month. A window whose card settlement has not closed is refused with `409 NOT_YET_AVAILABLE`, because its figures could still change. Retry once it has settled. **Fees are inside the changes.** A fee Grid charges comes out of the balance, so it is already in `amount`: inside a send's change, or a change of its own for a withdrawal's fee. Each change's `fee` says how much of its `amount` was a fee, negative when charged and positive when refunded. To show a fee as its own statement line, split the change into `amount - fee` and `fee`. Never add `fee` on top of `amount`, or the identity stops holding. Card transactions carry no Grid fee. Merchant, counterparty and rail detail live on the transaction; read them from `GET /transactions`. operationId: listInternalAccountBalanceChanges parameters: - name: from in: query required: true description: Start of the window, inclusive. Must include a timezone offset. schema: type: string format: date-time example: '2026-08-01T00:00:00-05:00' - name: to in: query required: true description: >- End of the window, exclusive. Must include a timezone offset and must not be in the future. schema: type: string format: date-time example: '2026-09-01T00:00:00-05:00' - name: limit in: query required: false description: Maximum number of changes to return per page schema: type: integer minimum: 1 maximum: 200 default: 100 - name: cursor in: query description: Cursor for pagination (returned from previous request) required: false schema: type: string responses: '200': description: The balance changes in the window, with the balances that bound it content: application/json: schema: $ref: '#/components/schemas/BalanceChangeListResponse' '400': description: >- Bad request. Returned when `from` or `to` is missing, has no timezone offset, or is in the future, when `from` is not before `to`, when `cursor` was not issued by this endpoint, or when the account has no statement of its own. content: application/json: schema: $ref: '#/components/schemas/Error400' '401': description: Unauthorized content: application/json: schema: $ref: '#/components/schemas/Error401' '404': description: Internal account not found content: application/json: schema: $ref: '#/components/schemas/Error404' '409': description: >- The window is not final yet. Card settlement for one of its boundaries has not closed, so its balances and changes could still change. Retry once it has settled. content: application/json: schema: $ref: '#/components/schemas/Error409' '500': description: Internal service error content: application/json: schema: $ref: '#/components/schemas/Error500' security: - BasicAuth: [] components: schemas: BalanceChangeListResponse: type: object description: >- A window of balance changes with the balances that bound it. The opening and closing balances describe the whole window, not the page, so they are the same on every page, and the identity `openingBalance + Σ(data[].amount) == closingBalance` holds only once every page's `data` is summed. required: - data - periodStart - periodEnd - openingBalance - closingBalance - hasMore properties: data: type: array description: Balance changes on this page, ordered by `effectiveAt` items: $ref: '#/components/schemas/BalanceChange' periodStart: type: string format: date-time description: Start of the window, inclusive example: '2026-08-01T00:00:00-05:00' periodEnd: type: string format: date-time description: End of the window, exclusive example: '2026-09-01T00:00:00-05:00' openingBalance: $ref: '#/components/schemas/CurrencyAmount' closingBalance: $ref: '#/components/schemas/CurrencyAmount' hasMore: type: boolean description: Indicates if more changes are available beyond this page example: false nextCursor: type: string description: >- Cursor to retrieve the next page of results (only present if hasMore is true) example: BalanceChange:019542f5-b3e7-1d02-0000-000000000003 countIsExact: type: boolean description: Whether `totalCount` is exact rather than capped example: true totalCount: type: integer description: Number of balance changes in the window, across all pages example: 42 Error400: type: object required: - reason - code properties: code: type: string description: > | Error Code | Description | |------------|-------------| | INVALID_INPUT | Invalid input provided | | END_USER_TERMS_VERSION_NOT_FOUND | The submitted version is not supported for the agreement it was sent for | | MISSING_MANDATORY_USER_INFO | Required customer information is missing | | INVITATION_ALREADY_CLAIMED | Invitation has already been claimed | | INVITATIONS_NOT_CONFIGURED | Invitations are not configured | | INVALID_UMA_ADDRESS | UMA address format is invalid | | INVITATION_CANCELLED | Invitation has been cancelled | | QUOTE_REQUEST_FAILED | An issue occurred during the quote process; this is retryable | | INVALID_PAYREQ_RESPONSE | Counterparty Payreq response was invalid | | INVALID_RECEIVER | Receiver is invalid | | PARSE_PAYREQ_RESPONSE_ERROR | Error parsing receiver PayReq response | | CERT_CHAIN_INVALID | Counterparty certificate chain is invalid | | CERT_CHAIN_EXPIRED | Counterparty certificate chain has expired | | INVALID_PUBKEY_FORMAT | Counterparty Public key format is invalid | | MISSING_REQUIRED_UMA_PARAMETERS | Counterparty required UMA parameters are missing | | SENDER_NOT_ACCEPTED | Sender is not accepted | | AMOUNT_OUT_OF_RANGE | Amount is out of range | | INVALID_CURRENCY | Currency is invalid | | INVALID_TIMESTAMP | Timestamp is invalid | | INVALID_NONCE | Nonce is invalid | | INVALID_REQUEST_FORMAT | Request format is invalid | | INVALID_BANK_ACCOUNT | Bank account is invalid | | SELF_PAYMENT | Self payment not allowed | | LOOKUP_REQUEST_FAILED | Lookup request failed | | PARSE_LNURLP_RESPONSE_ERROR | Error parsing LNURLP response | | INVALID_AMOUNT | Amount is invalid | | WEBHOOK_ENDPOINT_NOT_SET | Webhook endpoint is not set | | WEBHOOK_DELIVERY_ERROR | Webhook delivery error | | LOW_QUALITY | Document quality too low to process | | DATA_MISMATCH | Document details don't match provided information | | EXPIRED | Document has expired | | SUSPECTED_FRAUD | Document suspected of being forged or edited | | UNSUITABLE_DOCUMENT | Document type is not accepted or not supported | | INCOMPLETE | Document is missing pages or sides | | EMAIL_OTP_CREDENTIAL_ALREADY_EXISTS | An EMAIL_OTP credential is already registered on the target internal account; only one email OTP credential is supported per internal account at this time | | SMS_OTP_CREDENTIAL_ALREADY_EXISTS | An SMS_OTP credential is already registered on the target internal account; only one SMS OTP credential is supported per internal account at this time | | PASSKEY_CREDENTIAL_ALREADY_EXISTS | A PASSKEY credential with the same WebAuthn credentialId is already registered on the target internal account | | STABLECOIN_PROVIDER_ACCOUNT_INVALID | The stablecoin provider account link is not usable | | STABLECOIN_PROVIDER_ACCOUNT_REVOKED | The stablecoin provider account link has been revoked | | STABLECOIN_PROVIDER_ACCOUNT_SELECTION_REQUIRED | Multiple active provider account links exist; pass `stablecoinProviderAccountId` to select one | | CARDHOLDER_KYC_NOT_APPROVED | The cardholder's KYC status is not `APPROVED`, so a card cannot be issued | | TRANSACTION_SIZE_LIMIT_EXCEEDED | The requested amount exceeds the configured maximum single-transaction amount for this trade corridor or withdrawal currency | | EXTERNAL_ACCOUNT_VERIFICATION_REQUIRED | The destination account's ownership must be verified before this transfer can proceed | | INSUFFICIENT_FUNDS | Insufficient funds for this operation | | QUOTE_EXPIRED | The quote has expired; request a new quote | | QUOTE_RATE_UNAVAILABLE | No exchange rate is available for this corridor right now | | STABLECOIN_AMOUNT_NOT_REPRESENTABLE | The amount cannot be represented at the token's precision | | STABLECOIN_BURN_SOURCE_NOT_SUPPORTED | The burn source account cannot be used for this operation | | STABLECOIN_EXTERNAL_ACCOUNT_LINK_FAILED | Linking the external account for stablecoin operations failed | | STABLECOIN_EXTERNAL_ACCOUNT_LINK_METHOD_REQUIRED | The external account needs a link method before it can be used | | STABLECOIN_EXTERNAL_ACCOUNT_NOT_LINKED | The external account is not linked for stablecoin operations | | STABLECOIN_EXTERNAL_ACCOUNT_NOT_SUPPORTED | This external account type is not supported for stablecoin operations | | STABLECOIN_EXTERNAL_ACCOUNT_PROVIDER_LINK_FAILED | The provider could not link the external account | | STABLECOIN_EXTERNAL_ACCOUNT_PROVIDER_LINK_REQUIRED | The external account must be linked with the provider first | | STABLECOIN_GRID_OPERATIONS_NOT_ENABLED | The stablecoin is not enabled for Grid operations | | STABLECOIN_NOT_PROVISIONED | The stablecoin is not provisioned for issuer operations | | STABLECOIN_OPERATION_NOT_SUPPORTED | The stablecoin does not support this operation | | STABLECOIN_PROVIDER_ERROR | The stablecoin provider rejected the operation | | STABLECOIN_PROVIDER_SOURCE_NOT_LINKED | The provider source account is not linked | | STABLECOIN_VERIFICATION_FAILED | The stablecoin could not be verified with the provider | enum: - INVALID_INPUT - END_USER_TERMS_VERSION_NOT_FOUND - MISSING_MANDATORY_USER_INFO - INVITATION_ALREADY_CLAIMED - INVITATIONS_NOT_CONFIGURED - INVALID_UMA_ADDRESS - INVITATION_CANCELLED - QUOTE_REQUEST_FAILED - INVALID_PAYREQ_RESPONSE - INVALID_RECEIVER - PARSE_PAYREQ_RESPONSE_ERROR - CERT_CHAIN_INVALID - CERT_CHAIN_EXPIRED - INVALID_PUBKEY_FORMAT - MISSING_REQUIRED_UMA_PARAMETERS - SENDER_NOT_ACCEPTED - AMOUNT_OUT_OF_RANGE - INVALID_CURRENCY - INVALID_TIMESTAMP - INVALID_NONCE - INVALID_REQUEST_FORMAT - INVALID_BANK_ACCOUNT - SELF_PAYMENT - LOOKUP_REQUEST_FAILED - PARSE_LNURLP_RESPONSE_ERROR - INVALID_AMOUNT - WEBHOOK_ENDPOINT_NOT_SET - WEBHOOK_DELIVERY_ERROR - LOW_QUALITY - DATA_MISMATCH - EXPIRED - SUSPECTED_FRAUD - UNSUITABLE_DOCUMENT - INCOMPLETE - EMAIL_OTP_CREDENTIAL_ALREADY_EXISTS - SMS_OTP_CREDENTIAL_ALREADY_EXISTS - PASSKEY_CREDENTIAL_ALREADY_EXISTS - STABLECOIN_PROVIDER_ACCOUNT_INVALID - STABLECOIN_PROVIDER_ACCOUNT_REVOKED - STABLECOIN_PROVIDER_ACCOUNT_SELECTION_REQUIRED - CARDHOLDER_KYC_NOT_APPROVED - TRANSACTION_SIZE_LIMIT_EXCEEDED - EXTERNAL_ACCOUNT_VERIFICATION_REQUIRED - INSUFFICIENT_FUNDS - QUOTE_EXPIRED - QUOTE_RATE_UNAVAILABLE - STABLECOIN_AMOUNT_NOT_REPRESENTABLE - STABLECOIN_BURN_SOURCE_NOT_SUPPORTED - STABLECOIN_EXTERNAL_ACCOUNT_LINK_FAILED - STABLECOIN_EXTERNAL_ACCOUNT_LINK_METHOD_REQUIRED - STABLECOIN_EXTERNAL_ACCOUNT_NOT_LINKED - STABLECOIN_EXTERNAL_ACCOUNT_NOT_SUPPORTED - STABLECOIN_EXTERNAL_ACCOUNT_PROVIDER_LINK_FAILED - STABLECOIN_EXTERNAL_ACCOUNT_PROVIDER_LINK_REQUIRED - STABLECOIN_GRID_OPERATIONS_NOT_ENABLED - STABLECOIN_NOT_PROVISIONED - STABLECOIN_OPERATION_NOT_SUPPORTED - STABLECOIN_PROVIDER_ERROR - STABLECOIN_PROVIDER_SOURCE_NOT_LINKED - STABLECOIN_VERIFICATION_FAILED reason: type: string description: Error message details: type: object description: >- Additional error details. Shape varies by `code`. For field-validation errors on submit endpoints (e.g. `POST /customers`, `PATCH /customers/{id}`), `details.errors[]` enumerates every invalid field so platforms can render form-field-level UX for the entire request in a single round-trip. properties: errors: type: array description: >- One entry per invalid field. Present on field-validation errors from submit endpoints. items: $ref: '#/components/schemas/FieldError' additionalProperties: true Error401: type: object required: - reason - code properties: code: type: string description: > | Error Code | Description | |------------|-------------| | UNAUTHORIZED | Issue with API credentials | | INVALID_SIGNATURE | Signature header is invalid | | WALLET_SIGNATURE_MISSING | The `Grid-Wallet-Signature` header is required for this Embedded Wallet action but was not supplied | | WALLET_SIGNATURE_MALFORMED | The `Grid-Wallet-Signature` header could not be parsed (bad encoding, structure, or fields) | | WALLET_SIGNATURE_BODY_MISMATCH | The `Grid-Wallet-Signature` was computed over a different request body than the one received | | WALLET_SIGNATURE_INVALID | The `Grid-Wallet-Signature` failed cryptographic verification against the registered credential | | REQUEST_ID_MISSING | The `Request-Id` header is required on the signed retry but was not supplied (paired with `Grid-Wallet-Signature`) | enum: - UNAUTHORIZED - INVALID_SIGNATURE - WALLET_SIGNATURE_MISSING - WALLET_SIGNATURE_MALFORMED - WALLET_SIGNATURE_BODY_MISMATCH - WALLET_SIGNATURE_INVALID - REQUEST_ID_MISSING reason: type: string description: Error message details: type: object description: Additional error details additionalProperties: true Error404: type: object required: - reason - code properties: code: type: string description: > | Error Code | Description | |------------|-------------| | TRANSACTION_NOT_FOUND | Transaction not found | | INVITATION_NOT_FOUND | Invitation not found | | USER_NOT_FOUND | Customer not found | | QUOTE_NOT_FOUND | Quote not found | | LOOKUP_REQUEST_NOT_FOUND | Lookup request not found | | TOKEN_NOT_FOUND | Token not found | | BULK_UPLOAD_JOB_NOT_FOUND | Bulk upload job not found | | REFERENCE_NOT_FOUND | Reference not found | | UMA_NOT_FOUND | The UMA address is well-formed but no receiver exists at the counterparty VASP | | STABLECOIN_PROVIDER_ACCOUNT_NOT_FOUND | Stablecoin provider account link not found | | ACCOUNT_NOT_FOUND | Account not found | | AUTH_METHOD_NOT_FOUND | Authentication credential not found | | CUSTOMER_NOT_FOUND | Customer not found | | DOCUMENT_HOLDER_NOT_FOUND | Document holder not found | | NOT_FOUND | The requested resource was not found | | PAYMENT_URL_NOT_FOUND | Payment URL not found | | PLATFORM_NOT_FOUND | Platform not found | | REQUEST_NOT_FOUND | Pending request not found | | SESSION_NOT_FOUND | Session not found | | STABLECOIN_EXTERNAL_ACCOUNT_NOT_FOUND | Stablecoin external account not found | | STABLECOIN_NOT_FOUND | Stablecoin not found | | STABLECOIN_OPERATION_NOT_FOUND | Stablecoin operation not found | | VERIFICATION_NOT_FOUND | Verification not found | enum: - TRANSACTION_NOT_FOUND - INVITATION_NOT_FOUND - USER_NOT_FOUND - QUOTE_NOT_FOUND - LOOKUP_REQUEST_NOT_FOUND - TOKEN_NOT_FOUND - BULK_UPLOAD_JOB_NOT_FOUND - REFERENCE_NOT_FOUND - UMA_NOT_FOUND - STABLECOIN_PROVIDER_ACCOUNT_NOT_FOUND - ACCOUNT_NOT_FOUND - AUTH_METHOD_NOT_FOUND - CUSTOMER_NOT_FOUND - DOCUMENT_HOLDER_NOT_FOUND - NOT_FOUND - PAYMENT_URL_NOT_FOUND - PLATFORM_NOT_FOUND - REQUEST_NOT_FOUND - SESSION_NOT_FOUND - STABLECOIN_EXTERNAL_ACCOUNT_NOT_FOUND - STABLECOIN_NOT_FOUND - STABLECOIN_OPERATION_NOT_FOUND - VERIFICATION_NOT_FOUND reason: type: string description: Error message details: type: object description: Additional error details additionalProperties: true Error409: type: object required: - reason - code properties: code: type: string description: > | Error Code | Description | |------------|-------------| | TRANSACTION_NOT_PENDING_PLATFORM_APPROVAL | Transaction is not pending platform approval | | TRANSACTION_NOT_CANCELLABLE | Transaction has already settled or is otherwise past the point where it can be cancelled | | UMA_ADDRESS_EXISTS | UMA address already exists | | EMAIL_OTP_EMAIL_ALREADY_EXISTS | Email address is already associated with an EMAIL_OTP credential | | EMAIL_OTP_CREDENTIAL_SET_CHANGED | Tied EMAIL_OTP credential set changed after the signed-retry challenge was issued | | PASSKEY_ALREADY_ENROLLED | The customer already has an enrolled passkey factor; only one passkey per customer is supported. Delete the existing one before enrolling another | | SCA_SESSION_REQUIRED | The customer's Strong Customer Authentication login session is missing or expired. Re-authenticate the customer, then retry the request. Distinct from a `401`, which means the platform's own API credentials were rejected | | BENEFICIARY_TRUSTED | The external account is currently a trusted beneficiary, so it cannot be deleted. Untrust it first via `POST /customers/external-accounts/{externalAccountId}/untrust` (and its `/confirm`), then delete | | BANK_ACCOUNT_VALIDATION_PENDING | The US bank account on this request is still being validated. Grid verifies a newly added ACH account by sending a micro-entry and waiting out the return window, which takes a few banking days. The account is not rejected; retry once validation completes. A permanently failed account returns `400 INVALID_BANK_ACCOUNT` instead | | INVALID_STATE_TRANSITION | The requested card `status` transition is not one of `ACTIVE ⇄ FROZEN` or `ACTIVE \| FROZEN → CLOSED` | | CARD_ALREADY_CLOSED | `status: CLOSED` was requested for a card that is already `CLOSED` | | CARD_NOT_MUTABLE | The card is `CLOSED`, so it can no longer be mutated | | CARD_LIMIT_REACHED | The platform has reached the maximum number of live cards it may hold, or the cardholder already holds a card and the platform is limited to one per cardholder. Closing a card frees its slot; contact Lightspark to raise the limit | | STABLECOIN_GRID_ENABLEMENT_NOT_REQUESTABLE | Grid enablement can only be requested while the stablecoin is `NOT_ENABLED` (a repeat request while already `PENDING_APPROVAL` succeeds). `ENABLING`, `ENABLED` and `DISABLED` are driven by Lightspark and cannot be requested | | NOT_YET_AVAILABLE | The request is valid, but its result is not available yet because the data it depends on could still change. Retry later. `reason` says what is outstanding. For balance changes, card settlement for a window boundary has not closed | | CONFLICT | Generic resource-state conflict. Returned, for example, when `platformCustomerId` on a customer create call collides with an existing active customer on the same platform | | DOCUMENT_ALREADY_EXISTS | A document of this type already exists for the holder; replace it with PUT | | DUPLICATE_EXTERNAL_ACCOUNT | An equivalent external account already exists | | DUPLICATE_PAY_REQUEST | A pay request with this idempotency key already exists | | SMS_OTP_CREDENTIAL_SET_CHANGED | The SMS_OTP credential set changed while the request was in flight | | SMS_OTP_PHONE_NUMBER_ALREADY_EXISTS | The phone number is already associated with an SMS_OTP credential | | STABLECOIN_SYMBOL_ALREADY_EXISTS | A stablecoin with this symbol is already registered | | STABLECOIN_TOKEN_IDENTIFIER_ALREADY_EXISTS | A stablecoin with this token identifier is already registered | | WALLET_NOT_PROVISIONED | The embedded wallet has not been provisioned | enum: - TRANSACTION_NOT_PENDING_PLATFORM_APPROVAL - TRANSACTION_NOT_CANCELLABLE - UMA_ADDRESS_EXISTS - EMAIL_OTP_EMAIL_ALREADY_EXISTS - EMAIL_OTP_CREDENTIAL_SET_CHANGED - PASSKEY_ALREADY_ENROLLED - SCA_SESSION_REQUIRED - BENEFICIARY_TRUSTED - BANK_ACCOUNT_VALIDATION_PENDING - INVALID_STATE_TRANSITION - CARD_ALREADY_CLOSED - CARD_NOT_MUTABLE - CARD_LIMIT_REACHED - STABLECOIN_GRID_ENABLEMENT_NOT_REQUESTABLE - NOT_YET_AVAILABLE - CONFLICT - DOCUMENT_ALREADY_EXISTS - DUPLICATE_EXTERNAL_ACCOUNT - DUPLICATE_PAY_REQUEST - SMS_OTP_CREDENTIAL_SET_CHANGED - SMS_OTP_PHONE_NUMBER_ALREADY_EXISTS - STABLECOIN_SYMBOL_ALREADY_EXISTS - STABLECOIN_TOKEN_IDENTIFIER_ALREADY_EXISTS - WALLET_NOT_PROVISIONED reason: type: string description: Error message details: type: object description: Additional error details additionalProperties: true Error500: type: object required: - reason - code properties: code: type: string description: | | Error Code | Description | |------------|-------------| | GRID_SWITCH_ERROR | Grid switch error | | INTERNAL_ERROR | Internal server or UMA error | enum: - GRID_SWITCH_ERROR - INTERNAL_ERROR reason: type: string description: Error message details: type: object description: Additional error details additionalProperties: true BalanceChange: type: object description: >- One movement of the account's balance, signed in the account holder's polarity: money out is negative and money in is positive, so a window's changes sum to its closing balance less its opening balance. required: - id - amount - fee - effectiveAt properties: id: type: string description: Stable identifier for this balance change example: BalanceChange:019542f5-b3e7-1d02-0000-000000000003 transactionId: anyOf: - type: string - type: 'null' description: >- The transaction this change belongs to. Fetch it with `GET /transactions/{transactionId}` for its type, counterparty, merchant and rail. Several changes can share one transaction, for example an ACH deposit and its return, or a card purchase that settles in parts. Null for an adjustment with no transaction behind it. example: Transaction:019542f5-b3e7-1d02-0000-000000000004 amount: $ref: '#/components/schemas/CurrencyAmount' fee: allOf: - $ref: '#/components/schemas/CurrencyAmount' description: >- The part of `amount` that is a fee, signed the same way: negative for a fee charged, positive for a fee refunded, zero when the change carries no fee. Already included in `amount`, so never add it on top. Sum it across a period for the period's total fees. effectiveAt: type: string format: date-time description: >- When the account holder's balance moved. Changes are ordered by this time. example: '2026-09-03T14:31:00Z' CurrencyAmount: type: object required: - amount - currency properties: amount: type: integer format: int64 description: >- Amount in the smallest unit of the currency (e.g., cents for USD/EUR, satoshis for BTC) example: 12550 currency: $ref: '#/components/schemas/Currency' FieldError: type: object required: - field description: >- One field-level validation failure. Field-validation errors on submit endpoints (e.g. `POST /customers`, `PATCH /customers/{id}`) emit an array of these under `details.errors` so platforms can render form-field-level UX for every failure in a single round-trip. properties: field: type: string description: Dot-notation path to the offending field. example: identifier constraint: $ref: '#/components/schemas/FieldConstraint' message: type: string description: Human-readable explanation of what's wrong with this field. example: Value is not one of the allowed enum members. Currency: type: object properties: code: type: string description: >- Three-letter currency code (ISO 4217) for fiat currencies. Some cryptocurrencies may use their own ticker symbols (e.g. "BTC" for Bitcoin, "USDC" for USDC, etc.) example: USD name: type: string description: Full name of the currency example: United States Dollar symbol: type: string description: Symbol of the currency example: $ decimals: type: integer description: Number of decimal places for the currency minimum: 0 example: 2 FieldConstraint: type: object description: >- Machine-readable validator hint accompanying a 400 `INVALID_INPUT` error. Consumers use it to drive form UI (input types, dropdowns, masking, length limits) and to pre-validate the field client-side before re-submitting. Fields are additive. properties: format: type: string description: >- Named format the value must satisfy — HTML5 input type names (`email`, `tel`, `url`, `date`, ...) or semantic slugs (`iso3166-1-alpha-2`, `bcp47-language-tag`, `us-ssn`, `e.164`). example: email pattern: type: string description: Regular expression the value must match (JavaScript-flavor). example: ^\d{5}(-\d{4})?$ enum: type: array items: type: string description: Allowed values when the field is drawn from a fixed set. example: - SSN - ITIN - NON_US_TAX_ID minLength: type: integer description: Minimum length in characters. example: 1 maxLength: type: integer description: Maximum length in characters. example: 500 securitySchemes: BasicAuth: type: http scheme: basic description: >- API token authentication using format `:` AgentAuth: type: http scheme: bearer description: >- Bearer token authentication for agent-scoped endpoints. The token is the `accessToken` returned when redeeming a device code via `POST /agents/device-codes/{code}/redeem`. Agent credentials are user-scoped: all requests are automatically bound to the agent's associated customer and subject to the agent's policy. ````