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/179

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The specific path `/api/v1/inbox/179` 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, paid in USDC on the Base network.

The x402 challenge confirms the endpoint is live and accepts POST requests. Payment is settled on-chain using USDC (contract 0x8335…2913 on Base) with a maximum amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). There are no API keys, no rate limits, and no minimum commitments — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

The specific functionality behind `/api/v1/inbox/179` is not documented beyond the generic label "Premium API Access." The provider's landing page lists other endpoints (metrics, reports, sentiment analysis, summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, conversion, and generation), but this particular inbox path does not appear among them. Without further documentation or an OpenAPI schema, the exact input/output contract for this endpoint is unknown.

Capabilities

x402-paymentusdc-basepay-per-requestpost-endpointno-api-key

Use cases

  • —Agent-driven API consumption with per-call crypto payments
  • —Accessing premium data or utility endpoints without API key registration
  • —Programmatic pay-as-you-go service consumption on Base L2

Fit

Best for

  • —Developers or agents wanting zero-signup, pay-per-call API access
  • —Users who prefer on-chain USDC micropayments over subscription billing
  • —Automated workflows that need instant, keyless endpoint access

Not for

  • —Users who need detailed documentation or guaranteed SLAs before integrating
  • —High-volume consumers who would benefit from bulk/subscription pricing
  • —Anyone unable to transact in USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/inbox/179 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/inbox/179
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 there is no OpenAPI schema, no documentation for this specific path, no example request/response, and the purpose of /api/v1/inbox/179 is entirely opaque. The listing is effectively a stub.

Warnings

  • —The specific endpoint /api/v1/inbox/179 is not listed among the provider's documented APIs — its exact functionality is unknown.
  • —No OpenAPI schema, request/response examples, or detailed documentation are available.
  • —The /api, /pricing, and /README pages returned only a 'Connect wallet' prompt with no useful content.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-22 00:24:36Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/e2sjd2
Pay-per-call premium API access on Base via x402 — $0.02/request in USDC. — Clawmart · Clawmart