KYC verification endpoint on Base, pay-per-call via x402 with USDC.
What it does
This endpoint at lowpaymentfee.com provides a KYC (Know Your Customer) verification service accessible via the x402 payment protocol. The specific resource `/api/v1/kyc/verifications/4` accepts POST requests and charges up to $0.02 per call in USDC on the Base network. No API keys or rate limits are required — callers simply attach an x402 payment header to each request.
The broader lowpaymentfee.com platform advertises a suite of pay-per-request 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 in USDC on Base. However, the specific KYC verification endpoint being listed here is not prominently documented on the site's landing page, and no detailed input/output schema or documentation is available beyond the x402 challenge.
The endpoint is live and returns a valid x402 challenge (HTTP 402) with x402Version 1, confirming it accepts the "exact" payment scheme on Base using USDC (contract 0x8335…2913). The maximum amount required is 20,000 base units, which at 6 decimals equals $0.02. Timeout is 300 seconds. No OpenAPI spec, detailed docs, or example responses were found during crawling.
Capabilities
Use cases
- —Verifying customer identity as part of onboarding flows
- —Automated KYC checks in fintech or Web3 applications
- —Agent-driven compliance verification without API key management
- —Pay-per-use identity verification for low-volume or bursty workloads
Fit
Best for
- —Developers needing simple pay-per-call KYC without subscription commitments
- —AI agents that can settle payments via x402 on Base
- —Web3 applications already operating on the Base network
Not for
- —High-volume KYC pipelines needing bulk pricing or SLAs
- —Use cases requiring detailed documentation or guaranteed uptime commitments
- —Users who cannot transact in USDC on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/kyc/verifications/4 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no OpenAPI spec, no input/output schema documentation, no example requests or responses, and the KYC verification endpoint is not listed on the provider's landing page. The actual functionality behind this endpoint is entirely opaque.
Warnings
- —No documentation found for the /api/v1/kyc/verifications/4 endpoint — it is not listed among the provider's advertised APIs on the landing page.
- —No input schema or output schema is documented; callers have no guidance on what to POST.
- —No example responses available; actual KYC verification behavior is unknown.
- —The docs, API, pricing, and README pages all returned only a 'Connect wallet' prompt with no substantive content.
- —KYC/identity verification is a regulated category — verify the provider's compliance credentials before use in production.
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/kyc/verifications/4
- —All APIs are listed at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/kyc/verifications/4