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/apikeys/90

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The site hosts a collection of pay-per-request APIs spanning data & analytics, AI/ML inference, finance & Web3 data, and infrastructure utilities — all priced at $0.02 per request settled in USDC on the Base network.

The specific endpoint `/api/v1/apikeys/90` appears to be part of the platform's API key management or access provisioning system. The x402 challenge confirms it accepts POST requests, charges a maximum of 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals) per call, and settles payments to a specified wallet on Base. No API keys or rate limits are advertised — access is gated purely by micropayment.

Documentation is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content visible to crawlers. There is no OpenAPI schema, no request/response examples, and no detailed description of what this particular endpoint returns. The platform's landing page lists many endpoints but provides no technical documentation beyond names and prices.

Capabilities

x402-paymentusdc-micropaymentbase-networkpay-per-requestapi-key-provisioning

Use cases

  • —Provisioning or managing API keys via micropayment without traditional signup
  • —Agent-driven access to premium endpoints using x402 payment protocol
  • —Programmatic pay-as-you-go API consumption without subscriptions

Fit

Best for

  • —Developers wanting no-signup, pay-per-use API access
  • —AI agents that can settle x402 micropayments autonomously
  • —Users who prefer crypto-native payment rails over traditional billing

Not for

  • —Users needing detailed API documentation or OpenAPI specs before integrating
  • —High-volume consumers who would benefit from bulk pricing or subscriptions
  • —Developers who cannot transact in USDC on Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/apikeys/90 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/apikeys/90
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no schema, no request/response examples, and the specific purpose of this endpoint is unclear beyond its title 'Premium API Access'.

Warnings

  • —No OpenAPI schema or technical documentation available
  • —Docs/pricing/README pages render only 'Connect wallet' with no content for crawlers
  • —The exact functionality of /api/v1/apikeys/90 is unclear — it may provision API keys or grant access but this is inferred from the URL path alone
  • —No request body schema or response format documented

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 15:18:03Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/vB4pLV
Pay-per-call premium API access on Base via x402 — $0.02/request in USDC. — Clawmart · Clawmart