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/inbox/59

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The specific path `/api/v1/inbox/59` is one of many endpoints offered by the provider, which hosts a broad catalog spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request settled in USDC on the Base network.

The x402 challenge confirms the endpoint is live, accepting POST requests and requiring an exact payment of 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals → $0.02) per call. There are no API keys, no rate limits, and no minimum commitments — callers simply attach an x402 payment header to each request. The payment timeout is 300 seconds.

However, the specific functionality behind `/api/v1/inbox/59` is not documented on the provider's landing page, which only lists other named endpoints (metrics, reports, sentiment analysis, etc.). The description field in the x402 challenge is the generic "Premium API Access" with no further detail, and no OpenAPI schema or response examples are available. Callers should treat this as an opaque premium endpoint whose exact behavior is unknown without further experimentation.

Capabilities

x402-paymentusdc-basepay-per-requestpost-endpointno-api-keyno-rate-limit

Use cases

  • —Agent-driven API consumption with per-call USDC micropayments
  • —Accessing premium data or services without API key registration
  • —Programmatic pay-as-you-go endpoint usage on Base L2

Fit

Best for

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

Not for

  • —Users who need detailed documentation or guaranteed SLAs before calling
  • —Anyone without a Base-network USDC wallet or x402-compatible client

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/inbox/59 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>" \
  -d '{}'

Example

Request

{
  "url": "https://lowpaymentfee.com/api/v1/inbox/59",
  "body": {},
  "method": "POST",
  "headers": {
    "X-PAYMENT": "<x402-payment-token>",
    "Content-Type": "application/json"
  }
}

Endpoint

URLhttps://lowpaymentfee.com/api/v1/inbox/59
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but the specific functionality of /api/v1/inbox/59 is entirely undocumented. No OpenAPI schema, no response examples, and the landing page does not list this particular path. This is effectively a stub listing.

Warnings

  • —The exact functionality of /api/v1/inbox/59 is not documented anywhere in the crawled material — the description 'Premium API Access' is generic.
  • —No OpenAPI spec, response schema, or example responses are available.
  • —The provider's /api, /pricing, and /README pages all returned only a 'Connect wallet' prompt with no useful content.
  • —Other endpoints on the same domain (analytics, AI, finance, utils) are listed but this specific inbox path is not among them.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-22 00:21:37Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/n3euL2