Mono

Mono Lookup API

Identity and data verification for KYC/KYB.

Documentation GitHub OpenAPI

Operations 3

POST /v2/lookup/bvn/initiate Initiate BVN lookup #

POST /v3/lookup/account-number Account-number lookup #

POST /v3/lookup/mashup Mashup lookup #

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OpenAPI Specification

openapi: 3.2.0
info:
  title: Mono Connect Lookup API
  description: A grounded subset of the Mono open banking API for Africa.
  version: '2.0'
  contact:
    name: Mono
    url: https://mono.co
  x-provenance: Endpoint paths/methods grounded in docs.mono.co (2026-07-12). Request/response schemas are modeled and should be reconciled against the live API reference.
servers:
- url: https://api.withmono.com
  description: Mono production API host
security:
- monoSecKey: []
tags:
- name: Lookup
  description: Identity and data verification for KYC/KYB.
paths:
  /v2/lookup/bvn/initiate:
    post:
      operationId: lookupBvnInitiate
      tags:
      - Lookup
      summary: Initiate BVN lookup
      description: Initiates a consent-based BVN verification. The customer consents to the lookup (for example via an OTP/iGree flow) before verified details are returned. Modeled path - confirm the exact BVN sub-path against the live reference.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/BvnInitiateRequest'
      responses:
        '200':
          description: A BVN verification session was initiated.
          content:
            application/json:
              schema:
                type: object
                properties:
                  status:
                    type: string
                  message:
                    type: string
                  data:
                    type: object
        '401':
          $ref: '#/components/responses/Unauthorized'
  /v3/lookup/account-number:
    post:
      operationId: lookupAccountNumber
      tags:
      - Lookup
      summary: Account-number lookup
      description: Verifies ownership of a bank account by account number and bank code, returning the resolved account name. Served under the `/v3/lookup` path.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/AccountNumberLookupRequest'
      responses:
        '200':
          description: Resolved account holder information.
          content:
            application/json:
              schema:
                type: object
                properties:
                  status:
                    type: string
                  data:
                    type: object
        '401':
          $ref: '#/components/responses/Unauthorized'
  /v3/lookup/mashup:
    post:
      operationId: lookupMashup
      tags:
      - Lookup
      summary: Mashup lookup
      description: Cross-checks a customer's submitted identity against multiple sources in a single call (the Mashup Lookup). Served under the `/v3/lookup` path.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
      responses:
        '200':
          description: Aggregated identity verification result.
          content:
            application/json:
              schema:
                type: object
                properties:
                  status:
                    type: string
                  data:
                    type: object
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  schemas:
    Error:
      type: object
      properties:
        status:
          type: string
        message:
          type: string
    BvnInitiateRequest:
      type: object
      required:
      - bvn
      - scope
      properties:
        bvn:
          type: string
          description: The Bank Verification Number to verify.
        scope:
          type: string
          description: The consent scope, e.g. `identity`.
    AccountNumberLookupRequest:
      type: object
      required:
      - nip_code
      - account_number
      properties:
        nip_code:
          type: string
          description: The bank/institution NIP code.
        account_number:
          type: string
  responses:
    Unauthorized:
      description: The `mono-sec-key` is missing or invalid.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  securitySchemes:
    monoSecKey:
      type: apiKey
      in: header
      name: mono-sec-key
      description: Secret key for the application, found in the Mono dashboard. Sent on every server-to-server request in the `mono-sec-key` header. Use test keys in the sandbox and live keys in production.