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/payments/195

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/payments/195` is labeled "Premium API Access" in the x402 challenge. The probe confirms it is live, returning a 402 challenge with `maxAmountRequired` of 20000 base units of USDC (0x8335…2913 on Base, 6 decimals), which equals $0.02. Payment is made via the x402 exact scheme with a 300-second timeout. No API keys or rate limits are advertised; access is granted per-request upon payment.

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 detailed description of what this particular endpoint returns. The landing page lists many sibling endpoints but does not explain what data or functionality `/api/v1/payments/195` specifically provides. Prospective users should be aware that the actual behavior behind this endpoint is undocumented.

Capabilities

x402-paymentusdc-basepay-per-requestno-api-keypremium-api-access

Use cases

  • —Programmatic access to premium API functionality without API key management
  • —Agent-driven pay-per-request workflows settled in USDC on Base
  • —Integrating low-friction micropayment-gated endpoints into automated pipelines

Fit

Best for

  • —Developers wanting keyless, pay-per-use 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 or response schemas before integrating
  • —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/payments/195 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/195
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming pricing and payment details. However, there is no documentation, no OpenAPI schema, no request/response examples, and the specific functionality of /api/v1/payments/195 is entirely undescribed. The docs pages are empty beyond a wallet-connect prompt. This is effectively a stub listing.

Warnings

  • —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'
  • —No OpenAPI or output schema provided; the actual response format is unknown
  • —The specific functionality of /api/v1/payments/195 ('Premium API Access') is not described anywhere
  • —Cannot verify what data or service this endpoint actually delivers

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 06:53:49Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/w2gJXL
Pay-per-call premium API access on Base via x402 — $0.02 per request in USDC. — Clawmart · Clawmart