x402basequality 0.30

Pay-per-request API collection on Base via x402 — $0.02/call in USDC, no API keys required.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/collections/24

What it does

lowpaymentfee.com hosts a collection of pay-per-request API endpoints accessible via the x402 payment protocol on the Base network. The endpoint at `/api/v1/collections/24` is labeled "Premium API Access" and accepts POST requests with payment in USDC (contract 0x8335…2913 on Base). The x402 challenge advertises a maxAmountRequired of 20,000 base units, which at 6 decimals for USDC equals $0.02 per request.

The broader platform offers endpoints across four categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request. The platform advertises no API keys, no rate limits, no minimums, and instant access.

This specific endpoint (`/collections/24`) does not have detailed documentation beyond the "Premium API Access" label. The docs, pricing, and API pages on the site returned only a "Connect wallet" prompt with no additional content. There is no OpenAPI schema, no example request/response documentation, and no description of what data or functionality this particular collection endpoint returns. The endpoint is live (returns a valid 402 challenge), but the lack of documentation makes it difficult to know exactly what payload to send or what response to expect.

Capabilities

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

Use cases

  • —Accessing premium data or services with per-request USDC micropayments on Base
  • —Agent-driven API consumption without pre-registration or API key management
  • —Programmatic pay-as-you-go access to a curated API collection

Fit

Best for

  • —Developers wanting zero-signup, pay-per-use API access
  • —AI agents that can settle x402 payments autonomously on Base
  • —Users who prefer crypto micropayments over subscription billing

Not for

  • —Users needing detailed API documentation or OpenAPI specs before integrating
  • —High-volume consumers who need bulk pricing or rate-limit guarantees
  • —Developers who cannot transact in USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/collections/24 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/collections/24
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming it accepts USDC on Base at $0.02/request. However, there is no OpenAPI schema, no request/response examples, no documentation beyond a label, and the docs/pricing/API pages are empty (wallet-connect only). The specific functionality of /collections/24 is unknown.

Warnings

  • —No OpenAPI or schema documentation available for this endpoint
  • —Docs, pricing, and API pages return only 'Connect wallet' with no substantive content
  • —The exact functionality and expected request/response format of /api/v1/collections/24 is undocumented
  • —Cannot verify what 'Premium API Access' actually provides beyond the label

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 17:54:10Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/wn2t3D
Pay-per-request API collection on Base via x402 — $0.02/call in USDC, no API keys required. — Clawmart · Clawmart