> ## Documentation Index > Fetch the complete documentation index at: https://docs.antonpayments.com/llms.txt > Use this file to discover all available pages before exploring further. # List Batch Validation Errors > Return the row-level validation errors and warnings produced during the `validating` phase. Each error or warning carries the row number and field it applies to so you can point the merchant back to their source file. ## OpenAPI ````yaml GET /v1/batches/{id}/errors openapi: 3.1.0 info: title: Anton Payments API version: 1.0.0 summary: Cross-border payout infrastructure. Fiat, stablecoin, and crypto. description: > The Anton Payments merchant API. Versioned, idempotent, cursor-paginated. - **Authentication**: OAuth 2.0 client_credentials with DPoP proof-of-possession (RFC 6749 §4.4 + RFC 9449). Programmatic clients exchange `(client_id, client_secret)` for a short-lived access token at `POST /oauth/token`, then send each request with `Authorization: DPoP ` plus a per-request `DPoP: ` header. Static API keys are not accepted on v1. - Base URLs: `https://api.antonpayments.com` (production), `https://api.antonpayments.dev` (sandbox). - Monetary amounts are decimal strings. Never floats. - Timestamps are RFC 3339 UTC. - All mutating endpoints support the `Idempotency-Key` header. - Anton's OAuth public signing key is published at `GET /.well-known/jwks.json` (5-minute cache; RFC 8615). See the Cross-Cutting section of the docs for idempotency, pagination, rate limits, errors, webhook events, and webhook signing. contact: name: Anton Payments Support url: https://help.antonpayments.com license: name: Proprietary url: https://www.antonpayments.com servers: - url: https://api.antonpayments.com description: Production - url: https://api.antonpayments.dev description: Sandbox security: - oauthDPoP: [] dpopHeader: [] tags: - name: Authentication description: >- OAuth 2.0 token endpoint and JWKS publication. See the API description for the full DPoP-bound flow. - name: OAuth Clients description: >- Manage OAuth credentials (programmatic access). Portal-only — JWT auth required. - name: Reference Data description: Currencies, countries, and supported payment methods. - name: Beneficiaries description: Create and manage the people and businesses you pay. - name: Instruments description: >- Payment instruments attached to beneficiaries — bank accounts, wallets, cards. - name: Payouts description: Initiate and track payouts. - name: Batches description: CSV-driven bulk payout processing. - name: Balances description: Merchant balance by currency. - name: Accounts description: Virtual accounts for merchant funding. - name: Webhooks description: Subscribe to event notifications. - name: Documents description: Upload and manage KYB and supporting documents. - name: RFIs description: Respond to Requests for Information raised during review. - name: Pricing description: Read merchant pricing plans and quote fees. - name: FX description: Quote, lock, and execute currency exchanges between balances. - name: Corridors description: Active cross-border corridors for your merchant. - name: Balance Alerts description: >- Per-currency low-balance thresholds that drive the `balance.low` webhook event. - name: Sandbox description: Reset and seed your sandbox environment. - name: Merchant description: Merchant profile, branding, preferences, and security posture. - name: API Keys description: Issue, list, and revoke API keys. - name: Users description: Self-service profile, MFA, and team management. - name: Notifications description: Per-user notification channels and preferences. - name: Velocity description: Merchant-scoped risk rules and what-if simulation. - name: Engine description: Glass-box view of Anton's risk intelligence. - name: Onboarding description: Authenticated KYB onboarding draft and submission. - name: Public Onboarding description: >- Session-authenticated hosted onboarding flow. Not intended for SDK consumption. paths: /v1/batches/{id}/errors: parameters: - name: id in: path required: true schema: type: string pattern: ^bat_[a-zA-Z0-9]+$ get: tags: - Batches summary: List validation errors and warnings for a batch description: | Return the row-level validation errors and warnings produced during the `validating` phase. Each error or warning carries the row number and field it applies to so you can point the merchant back to their source file. operationId: listBatchErrors responses: '200': description: Errors and warnings keyed by row. content: application/json: schema: type: object properties: data: type: object properties: errors: type: array items: $ref: '#/components/schemas/BatchError' warnings: type: array items: $ref: '#/components/schemas/BatchWarning' '401': $ref: '#/components/responses/Unauthorized' '404': description: >- `batch_not_found` — the batch does not exist, or belongs to a different merchant. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' components: schemas: BatchError: type: object description: A row-level validation error. required: - row - message properties: row: type: integer description: 1-based row number in the original file. field: type: string description: Header/column the error applies to. Empty for row-level issues. message: type: string BatchWarning: type: object description: A non-blocking row-level warning. required: - row - type - message properties: row: type: integer type: type: string description: >- Category — e.g. `beneficiary_mismatch`, `duplicate_skip`, `duplicate_conflict`. message: type: string ErrorEnvelope: type: object required: - error properties: error: type: object required: - message properties: message: type: string description: Human-readable description of what went wrong. code: type: string description: Machine-readable error code. Branch on this, not on `message`. example: insufficient_balance example: error: message: insufficient funds for this payout code: insufficient_balance responses: Unauthorized: description: Missing or invalid API key, or key used against the wrong environment. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' examples: missing_key: summary: Missing bearer token value: error: code: unauthorized message: missing or invalid credentials wrong_environment: summary: Test key used against production value: error: code: key_environment_mismatch message: this API key is not valid for this environment securitySchemes: oauthDPoP: type: oauth2 description: > OAuth 2.0 client_credentials grant (RFC 6749 §4.4) bound to a DPoP keypair (RFC 9449). **Flow** (every authenticated `/v1` call requires both an access token AND a fresh per-request DPoP proof): 1. Register a credential via the merchant portal. Anton issues a `client_id` (`ant_oc__<32hex>`) and a `client_secret` (`ant_ocs__<48hex>`, shown ONCE). The portal generates an ES256 or Ed25519 DPoP keypair in your browser; you store the private half. 2. Mint an access token: `POST /oauth/token` with `Authorization: Basic ` and `Content-Type: application/x-www-form-urlencoded`. Body: `grant_type=client_credentials`. A `DPoP` header carrying a proof signed for the token endpoint is required (no `ath` claim on this proof). 3. Use the token: send `Authorization: DPoP ` plus a fresh `DPoP: ` header on every `/v1` request. The proof JWT MUST carry `htm` (request method), `htu` (request URL, no query/fragment), `iat` (within ±60s), `jti` (unique within 5 min), and `ath` (SHA-256 of the access token, base64url). Tokens expire in **1 hour** in production / staging and **8 hours** in sandbox. There are no refresh tokens — call `/oauth/token` again with your secret. Anton's public signing key is published at `/.well-known/jwks.json`. OpenAPI 3.0 has no native DPoP scheme; this declaration plus `dpopHeader` together convey both the access-token Authorization and the per-request proof header. flows: clientCredentials: tokenUrl: /oauth/token scopes: {} dpopHeader: type: apiKey in: header name: DPoP description: > Per-request DPoP proof JWT (RFC 9449). MUST accompany the `Authorization: DPoP ` header on every protected operation. The proof is signed by the merchant's private DPoP key and carries `htm`, `htu`, `iat`, `jti`, and `ath` claims. ````