> ## Documentation Index > Fetch the complete documentation index at: https://v2.docs.conduit.financial/llms.txt > Use this file to discover all available pages before exploring further. # Respond to an RFI > Submits a response to the RFI's currently open round. `submittedBy.email` is required on this surface (an API key has no user identity). Replaying the same `Idempotency-Key` returns the original response regardless of payload; a different key against an already-answered round 409s. ## OpenAPI ````yaml https://api.sandbox.conduit.financial/v2/api-docs/openapi.json post /rfis/{id}/responses openapi: 3.0.0 info: title: Conduit Sandbox API description: >- **Sandbox API** — clients integrate against this surface to exercise happy and unhappy paths without consuming real KYC/PSP credits or moving real money. Customer KYC, banking partners, and crypto custody are stubbed; org-level KYB runs against real providers. Simulation endpoints under `/v2/sandbox/*` drive specific scenarios. Internal and portal endpoints are excluded from this spec. version: '2.0' contact: {} servers: - url: https://api.sandbox.conduit.financial/v2 description: Sandbox - url: https://api.conduit.financial/v2 description: Production security: - api-key: [] tags: - name: Customers - name: Registered Addresses - name: Wallets - name: Wallet Signers - name: Signing Quorum - name: Virtual Accounts - name: Applications - name: Documents - name: Verifications - name: Signing Requests - name: Transactions - name: Payouts - name: Whitelist Recipients - name: Orders - name: RFIs - name: Webhook Endpoints - name: Webhook Deliveries - name: Webhook Event Types - name: Features - name: Customer Onboarding - name: Sandbox paths: /rfis/{id}/responses: post: tags: - RFIs summary: Respond to an RFI description: >- Submits a response to the RFI's currently open round. `submittedBy.email` is required on this surface (an API key has no user identity). Replaying the same `Idempotency-Key` returns the original response regardless of payload; a different key against an already-answered round 409s. operationId: RfiApiController_respond_v2 parameters: - name: id required: true in: path schema: type: string - name: Idempotency-Key in: header description: >- Caller-generated unique key that lets the server safely replay this request. The cached response is returned for 5 minutes on any retry with the same key from the same API principal. Required on every state-changing money-moving or resource-creating POST. required: true schema: type: string pattern: ^[A-Za-z0-9_.:-]{1,128}$ minLength: 1 maxLength: 128 requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/PublicRespondRfiBodyDto' responses: '201': description: '' content: application/json: schema: $ref: '#/components/schemas/ClientRfiDetailDto' '400': description: >- **INVALID_OID_FORMAT**: A path or query parameter expected a valid object identifier but received a value that does not match the expected format. **VALIDATION_ERROR**: The request body or query parameters failed validation. One or more fields have invalid values, missing required properties, or incorrect types. Multipart file uploads that fail at the multipart-parser layer (unexpected form-field name, too many parts) carry an extra 'field' member naming the offending form-field. **MALFORMED_JSON**: The request body could not be parsed as JSON. Bodies declared as 'application/json' — and bodies with no Content-Type header, which are assumed to be JSON — must contain syntactically valid JSON. **IDEMPOTENCY_KEY_REQUIRED**: This endpoint requires an Idempotency-Key header to prevent duplicate processing. Generate a unique key per logical request and resend the request. **IDEMPOTENCY_KEY_INVALID**: The Idempotency-Key header value did not match the required shape (1-128 characters, letters / digits / underscore / dot / colon / hyphen). **IDEMPOTENCY_BODY_TOO_NESTED**: The request body exceeds the maximum nesting depth allowed by the idempotency fingerprint hasher. Deeply-nested arrays or objects are rejected as a malformed payload. **DOCUMENT_IDS_NOT_FOUND**: One or more document IDs provided in the request do not exist or do not belong to this customer. content: application/json: schema: $ref: '#/components/schemas/ValidationErrorDto' example: type: INVALID_OID_FORMAT title: Invalid Object ID Format status: 400 detail: >- A path or query parameter expected a valid object identifier but received a value that does not match the expected format. resolution: >- Verify that all IDs in the request URL and query parameters are correctly formatted. IDs are typically prefixed strings like 'cus_...', 'app_...', or 'doc_...'. docs: https://conduit-v2.mintlify.app/errors#invalid-oid-format instance: /v2/... correlationId: req_a1b2c3d4 timestamp: '2026-01-15T09:30:00.000Z' '401': description: >- **API_KEY_MISSING**: The request did not include an API key. All API requests must be authenticated. **API_KEY_INVALID**: The provided API key is not recognized or has been revoked. content: application/json: schema: $ref: '#/components/schemas/ProblemDetailDto' example: type: API_KEY_MISSING title: API Key Missing status: 401 detail: >- The request did not include an API key. All API requests must be authenticated. resolution: >- Include your API key in the 'x-api-key' header with every request. docs: https://conduit-v2.mintlify.app/errors#api-key-missing instance: /v2/... correlationId: req_a1b2c3d4 timestamp: '2026-01-15T09:30:00.000Z' '403': description: >- **API_KEY_READ_ONLY**: This API key has read-only access and cannot perform write operations. Read-only keys may make read requests (GET, HEAD, OPTIONS) only. content: application/json: schema: $ref: '#/components/schemas/ProblemDetailDto' example: type: API_KEY_READ_ONLY title: API Key Is Read-Only status: 403 detail: >- This API key has read-only access and cannot perform write operations. Read-only keys may make read requests (GET, HEAD, OPTIONS) only. resolution: >- Use a read-write API key for this request, or have an organization admin mint one from the dashboard. docs: https://conduit-v2.mintlify.app/errors#api-key-read-only instance: /v2/... correlationId: req_a1b2c3d4 timestamp: '2026-01-15T09:30:00.000Z' '404': description: >- **RFI_NOT_FOUND**: No request-for-information exists with the specified ID, the RFI belongs to a different organization, or (on a client-facing surface) the RFI is still a draft and has never been published. content: application/json: schema: $ref: '#/components/schemas/ProblemDetailDto' example: type: RFI_NOT_FOUND title: RFI Not Found status: 404 detail: >- No request-for-information exists with the specified ID, the RFI belongs to a different organization, or (on a client-facing surface) the RFI is still a draft and has never been published. resolution: >- Verify the RFI ID is correct. Draft RFIs are never visible on client-facing surfaces — wait until the RFI is published. docs: https://conduit-v2.mintlify.app/errors#rfi-not-found instance: /v2/... correlationId: req_a1b2c3d4 timestamp: '2026-01-15T09:30:00.000Z' '409': description: >- **IDEMPOTENCY_KEY_CONFLICT**: The idempotency key was previously used with a different request body. Idempotency keys are bound to the exact request shape — replays must match the original. **IDEMPOTENCY_KEY_REQUEST_IN_PROGRESS**: A request with this idempotency key is already being processed and has not yet completed. Concurrent requests with the same key are rejected to prevent duplicate execution. **RFI_NOT_OPEN_FOR_RESPONSE**: A response can only be submitted while the RFI is open. This RFI is not open — the current round may already be answered, or the RFI has been resolved or cancelled. content: application/json: schema: $ref: '#/components/schemas/ProblemDetailDto' example: type: IDEMPOTENCY_KEY_CONFLICT title: Idempotency Key Conflict status: 409 detail: >- The idempotency key was previously used with a different request body. Idempotency keys are bound to the exact request shape — replays must match the original. resolution: >- Use a fresh idempotency key for the new request, or replay the original request unchanged. docs: >- https://conduit-v2.mintlify.app/errors#idempotency-key-conflict instance: /v2/... correlationId: req_a1b2c3d4 timestamp: '2026-01-15T09:30:00.000Z' '415': description: >- **UNSUPPORTED_MEDIA_TYPE**: The request carries a body with a Content-Type this endpoint cannot parse. JSON endpoints accept 'application/json'; a body with no Content-Type header at all is assumed to be JSON. File-upload endpoints accept only 'multipart/form-data' — JSON or undeclared bodies are rejected there. content: application/json: schema: $ref: '#/components/schemas/ProblemDetailDto' example: type: UNSUPPORTED_MEDIA_TYPE title: Unsupported Media Type status: 415 detail: >- The request carries a body with a Content-Type this endpoint cannot parse. JSON endpoints accept 'application/json'; a body with no Content-Type header at all is assumed to be JSON. File-upload endpoints accept only 'multipart/form-data' — JSON or undeclared bodies are rejected there. resolution: >- Send the request body with the 'Content-Type: application/json' header. For file uploads, use 'Content-Type: multipart/form-data' — upload endpoints accept no other body type. docs: https://conduit-v2.mintlify.app/errors#unsupported-media-type instance: /v2/... correlationId: req_a1b2c3d4 timestamp: '2026-01-15T09:30:00.000Z' '429': description: >- **RATE_LIMITED**: Too many requests. This error is returned by three independent checks: the per-organization bucket applied to every authenticated API request; the per-IP bucket applied to unauthenticated traffic before an API key is validated; and the per-IP bucket applied when repeated invalid API keys are submitted from the same address. Honor the Retry-After header (also exposed as retryAfterSeconds in the body) before retrying. Current limits and remaining budget are visible in X-RateLimit-Limit, X-RateLimit-Remaining, and X-RateLimit-Reset on rate-limited route responses. content: application/json: schema: $ref: '#/components/schemas/RateLimitedErrorDto' example: type: RATE_LIMITED title: Rate Limited status: 429 detail: >- Too many requests. This error is returned by three independent checks: the per-organization bucket applied to every authenticated API request; the per-IP bucket applied to unauthenticated traffic before an API key is validated; and the per-IP bucket applied when repeated invalid API keys are submitted from the same address. Honor the Retry-After header (also exposed as retryAfterSeconds in the body) before retrying. Current limits and remaining budget are visible in X-RateLimit-Limit, X-RateLimit-Remaining, and X-RateLimit-Reset on rate-limited route responses. resolution: >- Sleep until Retry-After seconds have elapsed, then retry. For sustained workloads exceeding the per-organization defaults, request a rate-limit increase through your support contact. docs: https://conduit-v2.mintlify.app/errors#rate-limited instance: /v2/... correlationId: req_a1b2c3d4 timestamp: '2026-01-15T09:30:00.000Z' retryAfterSeconds: 3 '500': description: >- **INTERNAL_ERROR**: An unexpected error occurred while processing your request. content: application/json: schema: $ref: '#/components/schemas/ProblemDetailDto' example: type: INTERNAL_ERROR title: Internal Error status: 500 detail: An unexpected error occurred while processing your request. resolution: >- Retry the request after a brief delay. If the error persists, contact support and include the correlationId from the error response for investigation. docs: https://conduit-v2.mintlify.app/errors#internal-error instance: /v2/... correlationId: req_a1b2c3d4 timestamp: '2026-01-15T09:30:00.000Z' components: schemas: PublicRespondRfiBodyDto: type: object properties: message: type: string minLength: 1 documentIds: default: [] maxItems: 20 type: array items: type: string pattern: ^doc_[0-9A-Za-z]{22}$ submittedBy: type: object properties: email: type: string format: email pattern: >- ^(?!\.)(?!.*\.\.)([A-Za-z0-9_'+\-\.]*)[A-Za-z0-9_+-]@([A-Za-z0-9][A-Za-z0-9\-]*\.)+[A-Za-z]{2,}$ name: type: string required: - email required: - message - submittedBy ClientRfiDetailDto: type: object properties: id: type: string pattern: ^rfi_[0-9A-Za-z]{22}$ subjects: type: array items: type: object properties: subjectType: type: string enum: - customer - transaction - organization subjectId: type: string required: - subjectType - subjectId status: type: string enum: - draft - open - responded - resolved - cancelled title: type: string dueAt: type: string format: date-time description: ISO 8601 timestamp example: '2026-01-15T09:30:00.000Z' publishedAt: type: string format: date-time description: ISO 8601 timestamp example: '2026-01-15T09:30:00.000Z' createdAt: type: string format: date-time description: ISO 8601 timestamp example: '2026-01-15T09:30:00.000Z' updatedAt: type: string format: date-time description: ISO 8601 timestamp example: '2026-01-15T09:30:00.000Z' summary: type: string rounds: type: array items: type: object properties: id: type: string pattern: ^rnd_[0-9A-Za-z]{22}$ roundNumber: type: integer minimum: -9007199254740991 maximum: 9007199254740991 status: type: string enum: - open - responded - closed ask: type: string dueAt: type: string format: date-time description: ISO 8601 timestamp example: '2026-01-15T09:30:00.000Z' openedAt: type: string format: date-time description: ISO 8601 timestamp example: '2026-01-15T09:30:00.000Z' closedAt: type: string format: date-time description: ISO 8601 timestamp example: '2026-01-15T09:30:00.000Z' required: - id - roundNumber - status - ask - dueAt - openedAt responses: type: array items: type: object properties: id: type: string pattern: ^rfr_[0-9A-Za-z]{22}$ roundId: type: string pattern: ^rnd_[0-9A-Za-z]{22}$ message: type: string documentIds: type: array items: type: string channel: type: string enum: - portal - api submittedByEmail: type: string submittedByName: type: string createdAt: type: string format: date-time description: ISO 8601 timestamp example: '2026-01-15T09:30:00.000Z' required: - id - roundId - message - documentIds - channel - submittedByEmail - createdAt required: - id - subjects - status - title - publishedAt - createdAt - updatedAt - rounds - responses ValidationErrorDto: type: object properties: type: type: string description: Machine-readable error code example: CUSTOMER_NOT_FOUND title: type: string description: Human-readable error type label example: Customer Not Found status: type: number description: HTTP status code example: 404 detail: type: string description: Human-readable explanation of this occurrence example: Customer with id cus_abc123 not found resolution: type: string description: What the developer should do to resolve this error example: >- Verify the customer ID. Check you are using the correct API key for this organization. docs: type: string description: URL to error documentation example: https://conduit-v2.mintlify.app/errors#customer-not-found instance: type: string description: Request path that produced the error example: /v2/customers/cus_abc123 correlationId: description: Request correlation ID example: req_a1b2c3d4 type: string timestamp: type: string description: ISO 8601 UTC timestamp example: '2026-04-27T20:00:00.000Z' details: description: >- Additional structured data for domain-specific errors (e.g. missing field lists, pair info) errors: type: array items: type: object properties: pointer: type: string description: JSON pointer to the invalid field example: /email detail: type: string description: What is wrong with this field example: Invalid email format allowedValues: description: The values this field accepts, when it is a closed set example: - ach - fedwire - rtp type: array items: type: string category: description: >- Class of blocker (requirements-validator output only). 'field' = form-field gap, 'document' = missing or insufficient document (including per-UBO document slots), 'individual' = required person missing. example: field type: string enum: - field - document - individual required: - pointer - detail required: - type - title - status - detail - resolution - docs - instance - timestamp ProblemDetailDto: type: object properties: type: type: string description: Machine-readable error code example: CUSTOMER_NOT_FOUND title: type: string description: Human-readable error type label example: Customer Not Found status: type: number description: HTTP status code example: 404 detail: type: string description: Human-readable explanation of this occurrence example: Customer with id cus_abc123 not found resolution: type: string description: What the developer should do to resolve this error example: >- Verify the customer ID. Check you are using the correct API key for this organization. docs: type: string description: URL to error documentation example: https://conduit-v2.mintlify.app/errors#customer-not-found instance: type: string description: Request path that produced the error example: /v2/customers/cus_abc123 correlationId: description: Request correlation ID example: req_a1b2c3d4 type: string timestamp: type: string description: ISO 8601 UTC timestamp example: '2026-04-27T20:00:00.000Z' details: description: >- Additional structured data for domain-specific errors (e.g. missing field lists, pair info) required: - type - title - status - detail - resolution - docs - instance - timestamp RateLimitedErrorDto: type: object properties: type: type: string description: Machine-readable error code example: CUSTOMER_NOT_FOUND title: type: string description: Human-readable error type label example: Customer Not Found status: type: number description: HTTP status code example: 404 detail: type: string description: Human-readable explanation of this occurrence example: Customer with id cus_abc123 not found resolution: type: string description: What the developer should do to resolve this error example: >- Verify the customer ID. Check you are using the correct API key for this organization. docs: type: string description: URL to error documentation example: https://conduit-v2.mintlify.app/errors#customer-not-found instance: type: string description: Request path that produced the error example: /v2/customers/cus_abc123 correlationId: description: Request correlation ID example: req_a1b2c3d4 type: string timestamp: type: string description: ISO 8601 UTC timestamp example: '2026-04-27T20:00:00.000Z' details: description: >- Additional structured data for domain-specific errors (e.g. missing field lists, pair info) retryAfterSeconds: type: integer minimum: 0 exclusiveMinimum: true maximum: 9007199254740991 description: Seconds to wait before retrying example: 3 required: - type - title - status - detail - resolution - docs - instance - timestamp - retryAfterSeconds securitySchemes: api-key: type: apiKey in: header name: x-api-key ````