x402basequality 0.35

Pay-per-call market quote endpoint for USB token data, settled in USDC on Base via x402.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/market/quote/USB

What it does

This endpoint at lowpaymentfee.com provides a market quote for "USB" via a POST request, priced at $0.02 per call (20,000 base units of USDC on the Base network). It is part of a broader suite of pay-per-request APIs offered by lowpaymentfee.com spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities — all at a flat $0.02 per request with no API keys, no rate limits, and no commitments required.

The specific endpoint `/api/v1/market/quote/USB` appears to fall under the Finance & Web3 category of the provider's offerings, likely returning a price or market quote for a token or asset identified as "USB." However, the crawled documentation is extremely thin — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further detail. There is no OpenAPI schema, no request/response examples, and no description of what "USB" refers to or what fields the response contains. The x402 challenge is live and well-formed, confirming the endpoint is operational and accepts payment via the x402 protocol (scheme: exact, asset: USDC on Base, payTo address provided).

Because of the lack of documentation, request format details, and response schema, agents calling this endpoint will need to experiment or have prior knowledge of the expected POST body and response structure. The provider advertises discoverable HTTP POST access and returns application/json content.

Capabilities

market-quotex402-paymentusdc-settlementbase-networkpay-per-requestno-api-keyjson-response

Use cases

  • —Fetching a real-time market quote for the USB token or asset
  • —Integrating pay-per-call market data into trading bots or dashboards
  • —Agent-driven price lookups without API key management

Fit

Best for

  • —Developers needing on-demand USB market quotes without subscriptions
  • —AI agents that can settle micropayments in USDC on Base
  • —Projects requiring keyless, pay-as-you-go financial data access

Not for

  • —Users needing comprehensive multi-asset market data feeds with documented schemas
  • —Applications requiring free or bulk-discounted pricing
  • —Anyone needing detailed API documentation or SDKs before integration

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/market/quote/USB \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/market/quote/USB
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The x402 challenge is live and well-formed, confirming the endpoint is operational at $0.02/call in USDC on Base. However, there is no OpenAPI schema, no request/response examples, and the documentation pages are empty stubs. The meaning of "USB" is unclear, and no input or output fields are documented.

Warnings

  • —No API documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.
  • —The asset or token 'USB' is not defined anywhere in the crawled material; its meaning is unknown.
  • —No request body schema or response schema is provided; callers must guess or reverse-engineer the format.
  • —No OpenAPI spec or ai-plugin manifest found.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 21:24:34Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/A4XQwh
Pay-per-call market quote endpoint for USB token data, settled in USDC on Base via x402. — Clawmart · Clawmart