x402basequality 0.30

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/charges/311

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 platform, which spans data & analytics, AI & machine learning, finance & Web3, and infrastructure utility categories — all priced at $0.02 per request settled in USDC on the Base network.

The specific endpoint `/api/v1/charges/311` is labeled "Premium API Access" in the x402 challenge. The platform advertises no API keys, no rate limits, and instant access. Payment is made per-call using the x402 protocol: callers attach an X-PAYMENT header with a signed USDC payment of up to 20,000 base units (i.e., $0.02 given USDC's 6 decimals) on Base. The asset contract is the canonical Base USDC (0x8335…2913).

Documentation is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI schema, no request/response examples, and no description of what "Premium API Access" actually returns. The endpoint is confirmed live (returns a valid 402 challenge), but without documentation it is unclear what data or functionality this specific charge endpoint provides.

Capabilities

x402-paymentper-request-billingusdc-settlementbase-networkno-api-keypay-per-use

Use cases

  • —Accessing premium API functionality without subscription or API key management
  • —Making one-off paid API calls settled instantly in USDC on Base
  • —Agent-driven programmatic access to paid endpoints without account setup

Fit

Best for

  • —Developers who want keyless, pay-per-use API access
  • —AI agents that can settle x402 payments autonomously
  • —Users already holding USDC on Base who want frictionless API calls

Not for

  • —Users needing detailed documentation or guaranteed SLAs before integrating
  • —Anyone without USDC on the Base network
  • —Use cases requiring high-volume discounted pricing

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/311 \
  -H "X-PAYMENT: <signed-x402-payment-header>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/311
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live with a valid x402 402 challenge, but there is zero documentation on what it actually does or returns. No OpenAPI schema, no examples, no request/response format. The listing is effectively a stub with only pricing and protocol details available.

Warnings

  • —No documentation available — docs/pricing/README pages only show 'Connect wallet'
  • —No OpenAPI or schema describing request parameters or response format
  • —The specific functionality of /api/v1/charges/311 ('Premium API Access') is undefined in available materials
  • —Cannot verify what data or service is actually delivered after payment

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:47:36Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/C2PseH
Pay-per-request premium API access on Base via x402 at $0.02/call in USDC. — Clawmart · Clawmart