x402basequality 0.25

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/charges/397

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 and settled in USDC on the Base network. No API keys, rate limits, or upfront commitments are required; callers simply attach an x402 payment header to each request.

The specific endpoint `/api/v1/charges/397` is listed as "Premium API Access" and returns a 402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals = $0.02) per call. The payment scheme is "exact" with a 300-second timeout. The endpoint accepts HTTP POST and returns `application/json`.

Documentation on the site is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no examples of what this particular endpoint actually returns. The landing page lists sibling endpoints for analytics, AI, finance, and utility tasks, but the specific functionality behind `/api/v1/charges/397` is not described beyond its title. Prospective users should be aware that without documentation, the actual payload and response structure are unknown.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestjson-apihttp-post

Use cases

  • —Accessing premium data or services with per-request USDC micropayments on Base
  • —Agent-driven API consumption without API keys or subscriptions
  • —Programmatic pay-as-you-go access to undocumented premium functionality

Fit

Best for

  • —Developers or agents wanting keyless, pay-per-call API access
  • —Users comfortable paying in USDC on Base L2
  • —Scenarios requiring no rate limits or upfront commitments

Not for

  • —Users who need detailed API documentation or guaranteed response schemas before purchasing
  • —Anyone without a Base-compatible USDC wallet
  • —High-volume use cases where per-request pricing may be inefficient compared to subscription plans

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/397 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/397
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming pricing and payment details. However, there is zero documentation on what the endpoint actually does, no request/response schemas, no examples, and no OpenAPI spec. The /docs and other pages are empty. The listing title 'Premium API Access' is generic and uninformative. This is effectively a stub.

Warnings

  • —No documentation available — /docs, /pricing, /api, and /README pages all render only 'Connect wallet' with no content
  • —No OpenAPI or schema describing request parameters or response format for this specific endpoint
  • —The exact functionality behind /api/v1/charges/397 is unknown; 'Premium API Access' is not descriptive
  • —Sibling endpoints on the site cover diverse domains (AI, finance, analytics, utilities) but it is unclear which, if any, this endpoint maps to

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 04:06:55Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/hw6bbq
Pay-per-call premium API access on Base via x402 — $0.02/request in USDC. — Clawmart · Clawmart