KYC verification endpoint on Base, paid per-call via x402 with USDC.
What it does
This endpoint at lowpaymentfee.com provides a KYC (Know Your Customer) verification service accessible at `/api/v1/kyc/verifications/5`. It uses the x402 payment protocol, accepting USDC on the Base network. The price per request is $0.02 (20,000 base units of USDC with 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof to access the endpoint.
The broader lowpaymentfee.com platform advertises a range of pay-per-call APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/Web3 data (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request and settle on the Base network using USDC.
Documentation is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what input the KYC verification endpoint expects or what it returns. The endpoint is confirmed live (returns a proper 402 x402 challenge), but without documentation it is unclear what data must be POSTed or what the response payload looks like.
Capabilities
Use cases
- —Verifying customer identity as part of onboarding flows
- —Automated KYC checks for fintech or Web3 applications
- —Compliance screening without managing API key provisioning
Fit
Best for
- —Developers needing pay-per-call KYC without subscription commitments
- —Web3 applications that can settle payments in USDC on Base
- —Agents or bots that can attach x402 payment headers automatically
Not for
- —Teams requiring detailed API documentation and SLAs before integration
- —High-volume KYC pipelines where per-call pricing may not be cost-effective
- —Users who cannot transact in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/kyc/verifications/5 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_proof>" \
-d '{}'Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but documentation is essentially nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI schema, no request/response examples, and no explanation of what the KYC verification endpoint actually does or expects. The listing is effectively a stub.
Warnings
- —No documentation available — all doc/pricing/API pages render only 'Connect wallet'
- —No OpenAPI or input/output schema provided for the KYC endpoint
- —Purpose and expected input of '/api/v1/kyc/verifications/5' is unclear — the path segment '5' may be a hardcoded example or a verification ID
- —The broader platform lists many diverse API categories but none have documented schemas
- —Cannot verify what KYC data source or methodology is used
Citations
- —Endpoint returns a valid x402 402 challenge with USDC on Base network, maxAmountRequired 20000 base unitshttps://lowpaymentfee.com/api/v1/kyc/verifications/5
- —All APIs priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/kyc/verifications/5
- —Docs, API, pricing, and README pages all show only 'Connect wallet'https://lowpaymentfee.com/docs