x402basequality 0.30

Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/payments/267

What it does

lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint at `/api/v1/payments/267` is listed as "Premium API Access" and returns a 402 challenge requesting up to 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals) per call. No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

The broader platform advertises multiple API categories including Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at the same $0.02/request price point. Payments settle to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base.

Documentation is extremely sparse — the docs, pricing, and API pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawl. The actual functionality behind this specific `/api/v1/payments/267` endpoint is unclear beyond its title "Premium API Access." Callers should be aware that without documented input/output schemas, integration requires experimentation or contacting the provider.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keyno-rate-limitjson-response

Use cases

  • —Programmatic access to a pay-per-call API without needing API key registration
  • —Agent-driven API consumption where payment is handled inline via x402 protocol
  • —Exploring x402-based micropayment patterns for API monetization

Fit

Best for

  • —Developers experimenting with x402 payment protocol on Base
  • —Agents that can attach x402 payment headers automatically
  • —Low-friction API access without signup or subscription

Not for

  • —Production workloads requiring documented and stable API contracts
  • —Users who need detailed request/response schemas before integration
  • —Anyone without a Base-network USDC wallet

Quick start

# The endpoint requires an X-PAYMENT header with a valid x402 payment proof.
# Using curl (you need an x402-compatible client to generate the header):
curl -X POST https://lowpaymentfee.com/api/v1/payments/267 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/267
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming it accepts USDC on Base at $0.02/request. However, there is no OpenAPI spec, no documented input/output schema, no usage examples, and the docs pages are empty. The purpose of this specific endpoint (/api/v1/payments/267) beyond 'Premium API Access' is unknown.

Warnings

  • —No OpenAPI or schema documentation available — input/output formats are undocumented
  • —Docs, pricing, API, and README pages all render only 'Connect wallet' with no useful content
  • —The specific functionality of /api/v1/payments/267 ('Premium API Access') is unclear — it may be a generic or placeholder endpoint
  • —No response examples or error documentation available

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 06:49:05Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/GLXpj4
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC. — Clawmart · Clawmart