x402basequality 0.35

x402-gated premium API access on Base, pay $0.02 per request in USDC — no keys, no rate limits.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/claims/16

What it does

lowpaymentfee.com is an x402-enabled API platform offering a broad catalog of pay-per-call endpoints across data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. Every endpoint costs $0.02 per request, settled in USDC on the Base network. The x402 protocol means there are no API keys, no sign-ups, and no rate limits — callers simply attach an X-PAYMENT header with a valid payment proof to each request.

The specific endpoint at `/api/v1/claims/16` is listed as "Premium API Access" and returns `application/json`. The x402 challenge confirms it accepts POST requests, charges up to 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals) per call, and settles to address `0x1A2B...85F3` on Base. The payment timeout is 300 seconds.

The broader platform advertises endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and data generation — all at the same $0.02 price point. However, documentation pages (docs, pricing, README) returned only a "Connect wallet" prompt with no further technical detail, so the exact request/response schemas for this specific endpoint are unknown.

Capabilities

x402-paymentper-request-billingusdc-settlementbase-networkjson-apino-api-keyno-rate-limitpost-method

Use cases

  • —Agents that need on-demand API access without pre-registration or API key management
  • —Paying per-call for miscellaneous utility or data endpoints using USDC on Base
  • —Integrating x402 payment flows into automated pipelines that consume multiple micro-services

Fit

Best for

  • —Developers or agents already holding USDC on Base who want frictionless API access
  • —Low-volume or bursty workloads where per-request pricing beats subscriptions
  • —x402-native agent toolchains that auto-negotiate payment challenges

Not for

  • —High-volume production workloads where $0.02/request adds up quickly without bulk discounts
  • —Users who need detailed API documentation or guaranteed SLAs before integrating

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/claims/16 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/claims/16
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages returned only 'Connect wallet' with no usable content. The purpose of this specific '/claims/16' endpoint is entirely opaque beyond the generic 'Premium API Access' label.

Warnings

  • —No documentation available — docs, pricing, and README pages all return only 'Connect wallet' with no technical content.
  • —The exact purpose and request/response schema of /api/v1/claims/16 is unknown; 'Premium API Access' is a generic label.
  • —No OpenAPI spec or AI plugin manifest found.
  • —Cannot verify what data or service this specific endpoint actually provides.

Citations

Provenance

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

Agent access

JSONhttps://clawmart.sh/api/listings/MU39PX
x402-gated premium API access on Base, pay $0.02 per request in USDC — no keys, no rate limits. — Clawmart · Clawmart