x402basequality 0.30

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/payments/322

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. It is one of many endpoints on the platform, which offers a broad catalog of pay-per-request APIs spanning data & analytics, AI & machine learning (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/payments/322` is labeled "Premium API Access" in the x402 challenge but its exact functionality is not documented beyond that label. The x402 challenge confirms it is live, accepts 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. No API keys or rate limits are advertised — access is gated purely by the x402 micropayment. The platform's documentation pages (docs, pricing, README) all render only a "Connect wallet" prompt with no additional technical detail.

Because the crawled docs are essentially empty and no OpenAPI schema or request/response examples are available, the actual input parameters and response format for this specific endpoint remain unknown. The platform appears to be a demonstration or early-stage x402 API marketplace. Agents should be aware that the endpoint's concrete behavior is undocumented.

Capabilities

x402-paymentusdc-basepay-per-requestpost-methodno-api-keymicropayment

Use cases

  • —Accessing premium API functionality with per-request USDC micropayments on Base
  • —Demonstrating x402 protocol integration for agent-to-service payments
  • —Exploring a no-signup, no-API-key pay-as-you-go API platform

Fit

Best for

  • —Developers experimenting with x402 micropayment protocols
  • —Agents that can settle USDC payments on Base L2
  • —Users who want zero-commitment, per-call API access without accounts

Not for

  • —Users needing well-documented API contracts with clear input/output schemas
  • —Production workloads requiring SLA guarantees or detailed error handling docs

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/payments/322 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/322
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but the endpoint's actual functionality is completely undocumented — no OpenAPI schema, no request/response examples, and all doc pages render only 'Connect wallet'. The 'Premium API Access' label is generic and uninformative.

Warnings

  • —Endpoint functionality is undocumented — 'Premium API Access' label gives no indication of what the endpoint actually does
  • —All documentation pages (docs, pricing, README) return only a 'Connect wallet' prompt with no technical content
  • —No OpenAPI or input/output schema available; request parameters and response format are unknown
  • —Platform may be a demo or early-stage project

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 07:03:44Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/Szy7tZ
Pay-per-call premium API access on Base via x402 — $0.02/request in USDC. — Clawmart · Clawmart