x402basequality 0.35

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/payments/202

What it does

lowpaymentfee.com hosts a collection of pay-per-request API endpoints gated by the x402 protocol on the Base network. This specific endpoint (`/api/v1/payments/202`) is labeled "Premium API Access" and accepts POST requests. Payment is settled in USDC (contract `0x8335…2913` on Base) at a maximum cost of $0.02 per call (20,000 base units with 6 decimals). No API keys, rate limits, or upfront commitments are required — callers simply attach an `X-PAYMENT` header with a valid x402 payment proof.

The broader lowpaymentfee.com platform advertises endpoints across four categories: 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 listed endpoints share the same $0.02/request pricing. However, the specific endpoint being listed here (`/api/v1/payments/202`) does not clearly map to any of these named services; its exact functionality beyond "Premium API Access" is not documented.

The endpoint is live and returns a well-formed x402 challenge (version 1, scheme "exact") with a 300-second payment timeout. Documentation pages on the site (/docs, /pricing, /api, /README) all render only a "Connect wallet" prompt with no further technical detail, so the request/response schema for this endpoint is unknown.

Capabilities

x402-payment-gatedusdc-settlementbase-networkpay-per-requestno-api-keypost-endpoint

Use cases

  • —Programmatic access to a premium API endpoint without needing API keys or subscriptions
  • —Agent-driven workflows that pay per call using USDC on Base
  • —Testing x402 payment flows against a low-cost live endpoint

Fit

Best for

  • —Developers experimenting with x402 payment-gated APIs
  • —AI agents that need keyless, pay-as-you-go API access
  • —Low-cost per-request usage without rate limits or commitments

Not for

  • —Users who need detailed API documentation or guaranteed SLAs
  • —Anyone requiring non-crypto payment methods
  • —High-volume batch workloads where $0.02/request adds up quickly

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/payments/202 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/202
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 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/202 is undescribed. All doc pages render only 'Connect wallet' with no content.

Warnings

  • —The exact functionality of /api/v1/payments/202 is not documented — 'Premium API Access' is the only description available.
  • —All documentation pages (/docs, /pricing, /api, /README) are empty beyond a 'Connect wallet' prompt.
  • —No OpenAPI spec, request schema, or response schema is available.
  • —The endpoint path does not match any of the named services listed on the homepage.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 06:45:30Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/CqC6j8
Pay-per-call premium API access on Base via x402 — $0.02/request in USDC. — Clawmart · Clawmart