Get the current BTC price via x402 micropayment on Base for $0.02 per request.
What it does
This endpoint returns the current Bitcoin (BTC) price in JSON format, gated behind an x402 payment challenge on the Base network. It is part of a broader suite of APIs offered by lowpaymentfee.com, which spans data analytics, AI/ML inference, finance/Web3 data, and utility services — all priced at $0.02 per request, payable in USDC on Base with no API keys, no rate limits, and no commitments.
The specific endpoint `/api/v1/tokens/BTC/price` accepts POST requests and returns a JSON response. Payment is handled via the x402 protocol: callers must include an `X-PAYMENT` header containing a valid payment proof for up to 20,000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base), which equals $0.02 USD (USDC uses 6 decimals). The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a maximum timeout of 300 seconds.
Documentation beyond the landing page is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI spec, no example request/response payloads, and no description of the response schema. The endpoint is confirmed live (returns a proper 402 challenge), but the actual response format for a successful paid request is unknown.
Capabilities
Use cases
- —Fetching the current BTC price for trading bots or portfolio dashboards
- —Agent-driven price lookups where per-call micropayments replace API key management
- —Integrating real-time Bitcoin pricing into Web3 dApps without subscription overhead
Fit
Best for
- —AI agents needing on-demand BTC price data with no signup
- —Low-volume or sporadic price lookups where per-call pricing is cheaper than a subscription
- —Developers prototyping crypto apps who want instant API access without credentials
Not for
- —High-frequency trading requiring sub-second latency and bulk pricing (no documented rate guarantees)
- —Users who need historical OHLCV candle data or order-book depth (only current price is indicated)
- —Non-crypto callers who cannot produce x402 payment proofs on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/tokens/BTC/price \
-H "X-PAYMENT: <x402_payment_proof>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is confirmed live with a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, no example payloads, and all documentation pages beyond the landing page are empty. The actual response format must be guessed from the endpoint path alone.
Warnings
- —No OpenAPI or schema documentation available — response format for successful requests is unknown.
- —All doc/pricing/README pages return only a 'Connect wallet' prompt with no technical content.
- —The endpoint path suggests BTC price data, but no formal specification confirms the response fields.
Citations
- —The endpoint returns a 402 challenge requesting 20,000 base units of USDC on Base (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), equaling $0.02.https://lowpaymentfee.com/api/v1/tokens/BTC/price
- —All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on the Base network.https://lowpaymentfee.com
- —The platform offers endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories.https://lowpaymentfee.com