x402basequality 0.35

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/keys/96

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-call APIs spanning data & analytics, AI/ML inference, finance & Web3 data, and infrastructure utilities, all priced at $0.02 per request settled in USDC on the Base network. No API keys, rate limits, or upfront commitments are required — callers simply attach an x402 payment header to each request.

The specific endpoint `/api/v1/keys/96` is listed as "Premium API Access" and returns a 402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals → $0.02) per call. The payment scheme is "exact" with a 300-second timeout. The endpoint accepts POST requests and returns `application/json`.

Because the endpoint path (`/keys/96`) does not clearly map to any of the named API categories on the landing page (analytics, AI, finance, utilities), its exact functionality is ambiguous. It may serve as a generic access-key provisioning or proxy endpoint. No OpenAPI schema, request/response examples, or detailed documentation were found beyond the landing page listing. Callers should experiment with POST payloads to discover the expected input format.

Capabilities

x402-paymentusdc-basepay-per-requestjson-apino-api-keyno-rate-limit

Use cases

  • —Agent-driven API consumption without pre-registration or API keys
  • —Micropayment-gated access to premium data or services
  • —Programmatic pay-as-you-go API calls settled on Base L2

Fit

Best for

  • —AI agents that need instant, keyless API access via x402
  • —Developers exploring x402 payment protocol integrations
  • —Low-volume or bursty workloads where per-call pricing beats subscriptions

Not for

  • —High-volume production workloads where $0.02/request adds up quickly
  • —Users who need detailed API documentation or SLAs before integrating
  • —Callers without a Base-network USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/keys/96 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>" \
  -d '{}'

Example

Request

{
  "url": "https://lowpaymentfee.com/api/v1/keys/96",
  "body": {},
  "method": "POST",
  "headers": {
    "X-PAYMENT": "<x402-payment-token>",
    "Content-Type": "application/json"
  }
}

Endpoint

URLhttps://lowpaymentfee.com/api/v1/keys/96
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming pricing and payment details. However, there is no OpenAPI schema, no request/response examples, no documentation beyond a landing page, and the specific purpose of /api/v1/keys/96 is unclear. This is effectively a stub listing.

Warnings

  • —No OpenAPI or schema documentation available for this endpoint
  • —The exact functionality of /api/v1/keys/96 is unclear — it does not map to any named API on the landing page
  • —No example responses or error codes documented
  • —The /api, /pricing, and /README pages returned only a 'Connect wallet' prompt with no useful content

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 22:18:34Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-21

Agent access

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