x402basequality 0.30

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/charges/284

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-request APIs spanning data & analytics, AI/ML inference (sentiment analysis, 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, settled in USDC on the Base network.

The specific endpoint `/api/v1/charges/284` is labeled "Premium API Access" and accepts POST requests. It returns a standard x402 challenge requiring an exact payment of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. No API keys or rate limits are advertised — access is gated purely by per-call micropayment.

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 data this particular charge endpoint actually returns. The site's landing page lists many endpoint paths but provides no detail on input parameters or response formats. Without additional documentation it is unclear what payload to send or what response to expect from `/api/v1/charges/284` specifically.

Capabilities

x402-paymentusdc-micropaymentbase-networkpay-per-requestno-api-keypost-endpoint

Use cases

  • —Programmatic access to premium data or services with per-call USDC micropayments
  • —Agent-driven API consumption without pre-registration or API keys
  • —Integrating pay-as-you-go endpoints into automated workflows on Base

Fit

Best for

  • —Developers wanting keyless, pay-per-request API access
  • —AI agents that can settle x402 micropayments in USDC on Base
  • —Projects needing low-friction API consumption without subscriptions

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before integrating
  • —Applications requiring fiat-only payment rails with no crypto wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/284 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/284
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge, confirming pricing and payment details. However, documentation is essentially nonexistent — all doc/pricing/README pages show only 'Connect wallet'. There is no OpenAPI schema, no request/response examples, and no description of what this specific endpoint does beyond the generic label 'Premium API Access'. The listing is effectively a stub.

Warnings

  • —No documentation available — docs, pricing, API, and README pages all render only 'Connect wallet'
  • —No OpenAPI or schema describing request parameters or response format
  • —The specific purpose of /api/v1/charges/284 ('Premium API Access') is undefined — it is unclear what data or service it provides
  • —No request or response examples available anywhere in crawled content

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:45:48Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/b2wq66
Pay-per-call premium API access on Base via x402 — $0.02 per request in USDC. — Clawmart · Clawmart