ICP liquidity data via pay-per-call x402 on Base (USDC, $0.02/request)
What it does
This endpoint at lowpaymentfee.com provides DeFi liquidity data for ICP (Internet Computer Protocol) via a simple HTTP POST call, gated by the x402 payment protocol. Each request costs $0.02 in USDC on the Base network — no API keys, no rate limits, and no sign-up required. The caller includes an X-PAYMENT header with a valid x402 payment proof, and the server returns a JSON response with the requested liquidity information.
The 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 market data, and utility services — all priced at $0.02 per request and settled in USDC on Base. The specific `/api/v1/defi/ICP/liquidity` route is not listed on the provider's landing page among the showcased endpoints, but it responds with a valid x402 402 challenge, confirming it is live and operational.
Because there is no OpenAPI schema, no documentation beyond the landing page, and no example request/response payloads available, the exact shape of the input body and the returned liquidity data structure are unknown. Callers should expect a JSON response (mimeType is `application/json`) and should experiment with POST bodies to discover accepted parameters. The payment is settled to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base mainnet.
Capabilities
Use cases
- —Querying real-time ICP liquidity pool data for trading bots
- —Monitoring ICP DeFi liquidity depth from an autonomous agent
- —Integrating ICP liquidity metrics into a portfolio dashboard
Fit
Best for
- —Agents or bots that need on-demand ICP liquidity data without managing API keys
- —Developers building DeFi dashboards who want simple pay-per-call pricing
- —Automated trading systems that need programmatic access to liquidity info
Not for
- —Users who need free or bulk-discounted high-volume data feeds
- —Anyone requiring detailed API documentation or guaranteed SLA before integration
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/defi/ICP/liquidity \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_proof>" \
-d '{}'Endpoint
Quality
The endpoint is live (valid x402 402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI schema, no documentation, no example request/response, and this specific route is not even listed on the provider's landing page. Effectively a stub listing.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —The /api/v1/defi/ICP/liquidity route is not listed among the provider's advertised APIs on the landing page
- —Request body format and response structure are completely unknown — no examples found
- —Docs, pricing, API, and README pages all returned only a 'Connect wallet' stub with no useful content
Citations
- —The endpoint returns a valid x402 402 challenge with maxAmountRequired 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/defi/ICP/liquidity
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 with 6 decimals, so 20000 base units = $0.02https://lowpaymentfee.com/api/v1/defi/ICP/liquidity
- —Platform advertises $0.02/request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —The /api/v1/defi/ICP/liquidity route is not among the endpoints listed on the landing pagehttps://lowpaymentfee.com