x402basequality 0.30

x402-gated premium API access on Base, paid per-request in USDC at $0.02/call.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/apikeys/26

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The site hosts a broad catalog of pay-per-call APIs spanning 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 priced at $0.02 per request.

The specific endpoint `/api/v1/apikeys/26` is listed as "Premium API Access" and returns a valid x402 challenge on POST. Payment is settled on the Base network in USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) using the "exact" scheme. The maximum amount required is 20,000 base units, which equals $0.02 (USDC uses 6 decimals). The payment address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.

Documentation is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/apikeys/26` endpoint specifically returns. The site's landing page lists many API categories but does not clarify what this particular "Premium API Access" endpoint does versus the other listed endpoints. It may be an endpoint for generating or retrieving API keys, but this is speculative.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestapi-key-management

Use cases

  • —Programmatic access to a suite of data, AI, finance, and utility APIs via x402 micropayments
  • —Agent-driven API consumption without traditional API key signup or subscription
  • —On-demand API key generation or retrieval paid per-call in USDC on Base

Fit

Best for

  • —Developers wanting no-signup, pay-per-use API access
  • —AI agents that can settle x402 payments on Base in USDC
  • —Users who prefer crypto micropayments over subscription billing

Not for

  • —Users needing detailed API documentation or OpenAPI specs before integrating
  • —High-volume consumers who need bulk pricing or rate-limit guarantees
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/apikeys/26 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/apikeys/26
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge, but documentation is essentially nonexistent — docs/pricing/README pages all show only 'Connect wallet'. There is no OpenAPI schema, no request/response examples, and no clear description of what this specific endpoint returns. The purpose of '/api/v1/apikeys/26' is ambiguous.

Warnings

  • —No documentation available — docs, pricing, and README pages render only a wallet-connect prompt
  • —No OpenAPI or schema definition for request or response payloads
  • —The specific function of /api/v1/apikeys/26 ('Premium API Access') is unclear relative to the other listed endpoints
  • —No request/response examples available anywhere in crawled content

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 15:21:45Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/j4HgGm
x402-gated premium API access on Base, paid per-request in USDC at $0.02/call. — Clawmart · Clawmart