Identity & KYC Verification APIs

Face Match API

Compare two photos and get a match score, for example a selfie against an ID photo.

What it verifies

Compares two photos of a face and returns whether they show the same person, with a match score. Typically a selfie against the photo on an ID.

Who uses it

Lenders and fintechs completing video-less KYC
Gig and marketplace platforms verifying partners
Insurers and brokers checking identity at claim time

Request and response

POSThttps://verification.techinnoverz.com/api/v1/identity-kyc/face-match

Compare two face images. This call is billed when it returns a successful result.

Request body

image1stringrequired

First photo, JPEG or PNG, base64 encoded (up to about 2 MB).

image2stringrequired

Second photo, JPEG or PNG, base64 encoded (up to about 2 MB).

consentstringrequired

Must be "Y". Records that the end customer consented to this check; logged against the transaction.

referenceIdstringoptional

Your own id, echoed back in the response for reconciliation.

Example requests

curl -X POST "https://verification.techinnoverz.com/api/v1/identity-kyc/face-match" \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "image1": "/9j/4AAQSkZJRgABAQAAAQABAAD...",
  "image2": "/9j/4AAQSkZJRgABAQAAAQABAAD...",
  "consent": "Y",
  "referenceId": "app_20915"
}'

const res = await fetch("https://verification.techinnoverz.com/api/v1/identity-kyc/face-match", {
  method: "POST",
  headers: {
    "x-api-key": "YOUR_API_KEY",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "image1": "/9j/4AAQSkZJRgABAQAAAQABAAD...",
    "image2": "/9j/4AAQSkZJRgABAQAAAQABAAD...",
    "consent": "Y",
    "referenceId": "app_20915"
  }),
});
const result = await res.json();

import requests

res = requests.post(
    "https://verification.techinnoverz.com/api/v1/identity-kyc/face-match",
    headers={"x-api-key": "YOUR_API_KEY"},
    json={
        "image1": "/9j/4AAQSkZJRgABAQAAAQABAAD...",
        "image2": "/9j/4AAQSkZJRgABAQAAAQABAAD...",
        "consent": "Y",
        "referenceId": "app_20915",
    },
    timeout=15,
)
result = res.json()

200 response — status "found"

Response

{
  "status": "found",
  "data": {
    "match": true,
    "matchScore": 92.4
  },
  "source": "provider",
  "dataAsOf": "2026-11-03T09:30:00.000Z",
  "referenceId": "app_20915",
  "billing": {
    "charged": true,
    "walletBalance": "12450.00"
  },
  "txnId": "txn_8c31ba90",
  "livemode": true
}

Fields returned in data

matchbooleanoptional

Whether the two photos show the same person.

matchScorenumberoptional

Similarity from 0 to 100.

Error codes

Errors return a non-200 HTTP status and the same envelope, so your retry logic and your reconciliation agree.

400 INVALID_INPUT

A field is missing or malformed. The details list each problem. Not charged.

401 INVALID_KEY

The key is missing, revoked, or not a key we issued.

402 WALLET_EMPTY

Your available balance is below the price of this call. Top up and retry. Not charged.

403 PRODUCTION_NOT_ENABLED

A live key was used before live access was enabled for your account. Use a test key, or ask us to enable live access.

403 TEST_NOT_ENABLED

A test key was used before test (UAT) access was enabled for your account. Ask us to enable it.

403 API_NOT_ENABLED

This check is switched off for your account, or is not available for live use yet.

403 IP_NOT_ALLOWED

The key is restricted to certain IP addresses and this call came from another.

403 ACCOUNT_SUSPENDED

The account is suspended. Contact support.

404 NO_DATA

A valid request, but no record was found. Not charged.

404 ROUTE_NOT_FOUND

There is no endpoint at that path.

405 METHOD_NOT_ALLOWED

Use the method shown in the Allow header.

409 IDEMPOTENCY_IN_PROGRESS

A call with the same Idempotency-Key is still being processed. Retry after the delay in Retry-After.

413 PAYLOAD_TOO_LARGE

The request body is too large. Not charged.

415 UNSUPPORTED_MEDIA_TYPE

Send the request with Content-Type: application/json.

422 IDEMPOTENCY_KEY_REUSED

This Idempotency-Key was already used with a different request body. Use a new key for a new request.

429 RATE_LIMITED

Too many requests or too many at once. Wait for the Retry-After delay.

500 INTERNAL_ERROR

Something went wrong on our side. Not charged. Quote the txnId if you contact support.

502 SOURCE_ERROR

The data source returned an error. Not charged.

503 SOURCE_DOWN

The data source is unavailable right now. Not charged. Retry after the delay in Retry-After.

504 SOURCE_TIMEOUT

The data source did not answer in time. Not charged.

Error response

{
  "status": "error",
  "error": {
    "code": "NO_DATA",
    "message": "No record found for the given input. Not charged."
  },
  "billing": {
    "charged": false
  },
  "txnId": "txn_8c31ba91",
  "livemode": true
}

Billing

You are charged only on successful hits. Failed, no-data and error calls are free.

Every response carries billing.charged and your remaining billing.walletBalance. Per-hit pricing is set on your rate card; book a demo to get yours.

Related checks

Aadhaar OTP Verification API — Consent-based Aadhaar verification with OTP delivered to the registered mobile number.
PAN Verification API — Verify PAN card details and status against Income Tax Department records.
PAN Advanced Verification API — Verify a PAN and also get its holder type and whether it is linked to Aadhaar.
Voter ID Verification API — Verify EPIC (Voter ID) details against Election Commission of India records.
Driving Licence Verification API — Verify driving licence number, validity and vehicle class against Parivahan records.
Face Match with Liveness API — Check that a selfie is of a live person and matches the photo on their ID, in one call.
DigiLocker Verification API — Consent-based fetch of a person's verified documents from DigiLocker.

All API documentation · OpenAPI specification · Docs as plain text