x402basequality 0.35

x402-gated API key endpoint on Base, pay $0.02 per request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/apikeys/48

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a variety of pay-per-call APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints on the platform are priced at $0.02 per request, settled in USDC on the Base network.

The specific endpoint `/api/v1/apikeys/48` appears to be an API key provisioning or access endpoint. The x402 challenge confirms it is live, accepting POST requests, and requires a payment of up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.

The platform advertises no API keys required, no rate limits, and instant access. Documentation pages (/docs, /pricing, /README) all returned only a "Connect wallet" prompt with no substantive content, so the actual request/response schemas for this endpoint are unknown. The platform lists other endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, and more — all at the same $0.02 price point.

Capabilities

x402-paymentusdc-basepay-per-requestapi-key-provisioningpost-method

Use cases

  • —Programmatically obtaining API keys via a single USDC micropayment
  • —Agent-driven access to a gated API without traditional signup or subscription
  • —Integrating pay-per-request infrastructure into automated workflows

Fit

Best for

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

Not for

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

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/apikeys/48 \
  -H "X-PAYMENT: <x402-payment-token>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/apikeys/48
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 OpenAPI schema, no documentation beyond a wallet-connect prompt, and no information about what the request body should contain or what the response looks like. The purpose of the specific /apikeys/48 path is unclear — it could provision an API key or grant access to something, but this is only inferred from the URL and title.

Warnings

  • —No documentation available — /docs, /pricing, and /README pages all show only 'Connect wallet' with no content.
  • —Request and response schemas are completely unknown; no OpenAPI spec or examples provided.
  • —The exact purpose of /api/v1/apikeys/48 is unclear — 'Premium API Access' is the only description.
  • —The platform lists many endpoints but none have documented input/output formats.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 15:22:17Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/dRZtvk
x402-gated API key endpoint on Base, pay $0.02 per request in USDC. — Clawmart · Clawmart