> ## Documentation Index > Fetch the complete documentation index at: https://docs.zapyd.com/llms.txt > Use this file to discover all available pages before exploring further. # Fetch KYC Configuration > Returns a customer's KYC configuration, including which fields are required. Add the Zapyd "Fetch KYC Configuration" call (`GET /cms/api/v1/kyc/configuration/{customer_id}`) to my backend. Returns a customer's KYC configuration, including which fields are required. * Sandbox: `GET https://sandbox.zapyd.com/cms/api/v1/kyc/configuration/{customer_id}` * Production: `GET https://api.zapyd.com/cms/api/v1/kyc/configuration/{customer_id}` Path parameters: * `customer_id` (string, uuid, required): The customer whose KYC configuration to read. Its country decides the documents and fields. Success: HTTP 200, `{status: true, message, data}`. `data`: `supported_document_types`, `additional_info_required` (`options`, `rules`, `income_range`, `profession`), `is_tax_required` (Whether tax\_number is required for this customer's country. true for India). Errors (`{status: false, message, err_code, errors}`): * 400 `Customer not found or access denied`: Customer not found; Customer does not belong to the organization * 500 `Internal Server Error` Every endpoint can also return 401 `AUTH_*` (signature, timestamp or key: fix, don't retry), and 429 or 5xx (retry with backoff). Rules: * Call it before `POST /kyc/add-kyc-data`, once per customer country, and build the KYC form from it. * `supported_document_types` are the allowed `document_type` values. `additional_info_required.options` are the keys allowed in `additional_info`; `rules` (`allOf` or `anyOf`, `min_required`) says how many to send. `is_tax_required` says whether `tax_number` is required. Signing (every request): * Headers: `X-API-KEY`, `X-TIMESTAMP` (Unix seconds, within 300 s of server time; generate per request) and `X-SIGNATURE`. * `X-SIGNATURE` = Base64(HMAC-SHA256(key = API secret, message = apiKey + "|" + timestamp + "|" + canonicalBody)). Base64 of the raw digest, not hex. * canonicalBody: the JSON body with keys sorted at every nesting level, no whitespace (separators `,` and `:`), and every non-ASCII character escaped as lowercase `\uXXXX` (Python `json.dumps(body, sort_keys=True, separators=(",", ":"))`). Requests with no body (GET, DELETE) sign `{}`. Query parameters are not signed. * Send the exact canonicalBody string you signed as the request body, with `Content-Type: application/json`. * Test vector: key `3f1b2c4d-5e6f-4a7b-8c9d-0e1f2a3b4c5d`, secret `test-secret-do-not-use`, timestamp `1735689600`. Signing `{}` gives `6sCtVSRQjU9+2/af8gdwUAvY1l6Ii6ENcbRfanPkhY0=`. Body `{"customer_id":"78c99d71-f28f-47a9-8302-93b286efbe0e","amount":100.5,"currency":"INR","meta":{"note":"Café","b":2,"a":1}}` gives `l+DvQrzlKbsOSxSYOdWoWHEehcFRZfDJPKlLDkm2cSI=`. Deliver: 1. A typed `fetchKycConfiguration` function in this codebase's language and HTTP client. Reuse an existing Zapyd client and signer, or write one small shared client. 2. Config from `ZAPYD_API_KEY`, `ZAPYD_API_SECRET` and `ZAPYD_BASE_URL`. The secret stays on the server, never in a browser or app. 3. Return `data`. When `status` is false, throw an error with the HTTP status, `err_code`, `message` and `errors`. Don't show raw errors to end users. 4. Retry only 429 and 5xx: exponential backoff from 1 s, capped at 30 s, at most 5 attempts. 5. Amounts as strings. Types for every field above. 6. Tests: the signer against the test vector, and this call against sandbox. Reference: `https://docs.zapyd.com/api-reference-exchange/endpoint/kyc/configuration-{customer_id}.md` | API Status Code | Response | Reason | | - | - | - | | 400 | Customer not found or access denied | Customer not found | | 400 | Customer not found or access denied | Customer does not belong to the organization | | 500 | Internal Server Error. | Internal Server Error | ## OpenAPI ````yaml GET /kyc/configuration/{customer_id} openapi: 3.1.0 info: title: Zapyd API description: API for Zapyd - Customer, Payout, and Webhook services license: name: MIT version: 1.0.0 servers: - url: https://sandbox.zapyd.com/pos/api/v1 description: Payout API Base URL variables: base_url: default: https://sandbox.zapyd.com - url: https://sandbox.zapyd.com/cms/api/v1 description: Customer API Base URL variables: base_url: default: https://sandbox.zapyd.com security: - ApiKeyAuth: [] TimestampAuth: [] SignatureAuth: [] tags: - name: Customer description: Customer related operations x-displayName: Customer x-traitTag: true - name: Payout description: Payout related operations - name: Webhooks description: Webhook related operations - name: Widget description: Hosted buy/sell widget session initialization paths: /kyc/configuration/{customer_id}: get: tags: - KYC description: >- Returns basic configuration for KYC - supported document types, additional information fields required parameters: - name: customer_id in: path required: true description: >- The customer whose KYC configuration to read. Its country decides the documents and fields. schema: type: string format: uuid example: 550e8400-e29b-41d4-a716-446655440000 responses: '200': description: Successful response content: application/json: schema: type: object properties: status: type: boolean example: true message: type: string example: Success data: type: object properties: supported_document_types: type: array example: - AADHAAR - PASSPORT - VOTER_ID - DRIVING_LICENSE additional_info_required: type: object properties: options: type: array example: - income_range - profession rules: type: object example: type: allOf min_required: 2 income_range: type: object example: type: string required: true profession: type: object example: type: string required: true is_tax_required: type: boolean description: >- Whether tax_number is required for this customer's country. true for India. example: true '500': description: Internal Server Error content: application/json: schema: type: object properties: status: type: boolean example: false message: type: string example: Internal Server Error data: type: 'null' err_code: type: string example: SYS_INTERNAL_ERROR errors: type: string example: Unexpected error occurred. Please try again later. servers: - url: https://sandbox.zapyd.com/cms/api/v1 description: KYC API Base URL components: securitySchemes: ApiKeyAuth: type: apiKey in: header name: X-API-KEY description: API Key for authentication TimestampAuth: type: apiKey in: header name: X-TIMESTAMP description: Current timestamp in seconds since epoch SignatureAuth: type: apiKey in: header name: X-SIGNATURE description: HMAC SHA256 signature of the request encoded in Base64 ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.