Pay-per-call market quote endpoint on Base via x402, settling in USDC at $0.02/request.
What it does
The `/api/v1/market/quote/PM` endpoint on lowpaymentfee.com provides premium market quote data, accessible via the x402 payment protocol. Each request costs $0.02, paid 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 POST request.
This endpoint is part of a broader platform (lowpaymentfee.com) that offers dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services, all at the same $0.02/request price point. The specific `/market/quote/PM` path suggests it returns a market quote for a "PM" symbol or asset, though the exact response schema is not documented.
The x402 challenge confirms the endpoint is live, accepting POST requests and settling payments to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base. The maximum amount required is 20,000 base units (i.e., $0.02 given USDC's 6 decimals). The payment timeout is 300 seconds. No OpenAPI spec, detailed documentation, or example responses were found in the crawl — the docs, pricing, and API pages all rendered only a "Connect wallet" prompt with no further content.
Capabilities
Use cases
- —Fetching a real-time market quote for the PM asset/symbol
- —Integrating pay-per-call market data into trading bots or dashboards
- —Agent-driven market data retrieval without API key management
- —On-demand price lookups settled in USDC on Base
Fit
Best for
- —Developers wanting zero-commitment, pay-as-you-go market quotes
- —AI agents that can settle x402 payments autonomously
- —Projects already operating on the Base L2 with USDC
Not for
- —Users needing detailed API documentation or guaranteed SLAs before integrating
- —High-frequency trading requiring sub-second latency guarantees
- —Anyone who needs non-crypto payment rails
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/market/quote/PM \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>"Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02/request in USDC on Base), but there is no OpenAPI spec, no documented request/response schema, no example payloads, and the docs pages are empty. The meaning of 'PM' in the path is undocumented. This is effectively a stub listing with a confirmed live payment gate.
Warnings
- —No OpenAPI or schema documentation available — request and response formats are unknown
- —Docs, pricing, API, and README pages all render only 'Connect wallet' with no usable content
- —The 'PM' path segment is unexplained; it is unclear what asset or market it refers to
- —No example responses were found anywhere in the crawl
Citations
- —Endpoint returns HTTP 402 with x402 challenge requiring 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/market/quote/PM
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/market/quote/PM
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —Docs, pricing, API, and README pages show only 'Connect wallet' with no further contenthttps://lowpaymentfee.com/docs