x402basequality 0.30

Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/inbox/177

What it does

lowpaymentfee.com is an x402-enabled API platform that provides a broad collection of endpoints spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are pay-per-request using USDC on the Base network, with no API keys, no rate limits, and no minimum commitments required.

The specific endpoint at `/api/v1/inbox/177` is listed as "Premium API Access" and accepts POST requests. Its x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). Payment is made via the x402 exact scheme, settling to the provider's wallet on Base. The endpoint returns `application/json` responses.

The broader platform advertises additional endpoints including sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02/request price point. However, the specific functionality behind the `/api/v1/inbox/177` path is not documented beyond the generic "Premium API Access" label, so its exact behavior is unclear. No OpenAPI schema, request body documentation, or example responses are available for this endpoint.

Capabilities

x402-paymentusdc-basepay-per-requestjson-responsepost-methodno-api-key

Use cases

  • —Programmatic access to a pay-per-call API without needing API key registration
  • —Agent-driven workflows that need on-demand API access settled via USDC on Base
  • —Testing x402 payment flows against a live endpoint

Fit

Best for

  • —Developers wanting zero-signup, pay-as-you-go API access
  • —AI agents with USDC on Base that need general-purpose API calls
  • —Prototyping x402 payment integrations

Not for

  • —Users who need detailed documentation or guaranteed SLAs before integrating
  • —High-volume use cases where $0.02/request adds up significantly

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/inbox/177 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/inbox/177
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02/request in USDC on Base). However, the specific functionality of /api/v1/inbox/177 is completely undocumented — no request schema, no response examples, no description beyond the generic 'Premium API Access' label. The crawled pages beyond the homepage returned only 'Connect wallet' with no useful content.

Warnings

  • —The exact functionality of /api/v1/inbox/177 is unknown — 'Premium API Access' is not a meaningful description of what the endpoint does
  • —No OpenAPI spec, request schema, or response examples are available
  • —Documentation pages (/api, /pricing, /README) returned no useful content — only 'Connect wallet'
  • —The platform lists many endpoints but none have detailed documentation visible from the crawl

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-22 00:17:41Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/B3DJA7
Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request. — Clawmart · Clawmart