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/96

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/96 is labeled "Premium API Access" and charges up to 20,000 base units of USDC (i.e., $0.02) per call. No API keys, accounts, 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 $0.02 per request. However, the specific functionality behind the /api/v1/payments/96 endpoint is not documented beyond its "Premium API Access" label, and the crawled docs/pricing/README pages returned only a wallet-connect prompt with no additional content.

The endpoint is live and returns a valid x402 challenge (HTTP 402) with payment details settling to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base. The x402 version is 1, the scheme is "exact", and the maximum timeout is 300 seconds. No OpenAPI schema, request/response examples, or detailed documentation were found for this specific endpoint.

Capabilities

x402-paymentusdc-basepay-per-requestno-api-keyno-rate-limitpremium-api-access

Use cases

  • —Accessing premium API functionality with per-request USDC micropayments on Base
  • —Agent-driven API consumption without pre-registration or API keys
  • —Testing x402 protocol integrations with a low-cost endpoint

Fit

Best for

  • —Developers or agents wanting keyless, pay-per-call API access
  • —x402 protocol users settling in USDC on Base
  • —Low-commitment API usage with no minimums or subscriptions

Not for

  • —Users needing detailed API documentation or guaranteed SLAs
  • —Use cases requiring known, well-documented response schemas
  • —Users who cannot transact in USDC on the Base network

Quick start

# The endpoint requires an x402 X-PAYMENT header with a valid payment proof.
# Using curl to see the 402 challenge:
curl -X POST https://lowpaymentfee.com/api/v1/payments/96 \
  -H 'Content-Type: application/json'
# Returns 402 with x402 challenge. Attach a valid X-PAYMENT header to complete.

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/96
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge, but there is no documentation, no OpenAPI schema, no request/response examples, and the specific functionality of /api/v1/payments/96 ('Premium API Access') is entirely undescribed. The docs, pricing, and README pages all returned only a wallet-connect prompt with no useful content.

Warnings

  • —The specific functionality behind /api/v1/payments/96 is undocumented — 'Premium API Access' is the only label provided.
  • —No OpenAPI spec, request schema, or response schema is available for this endpoint.
  • —All documentation pages (docs, pricing, README, api) returned only a wallet-connect prompt with no substantive content.
  • —The platform lists many API categories (AI, analytics, finance, infrastructure) but none are documented in detail; actual capabilities are unverified.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 07:31:55Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/c3uhrE
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC. — Clawmart · Clawmart