Chat-based CoinGecko crypto data agent accessible via x402 micropayment on Base Sepolia
What it does
This endpoint exposes a CoinGecko-powered AI agent hosted on the Questflow platform, accessible via the x402 payment protocol. Callers send a natural-language message (e.g. "What is the current price of Bitcoin?") as a POST request with an X-PAYMENT header, and receive a text response from the agent that draws on CoinGecko's cryptocurrency data aggregation covering 17,000+ crypto assets across 1,000+ exchanges.
The agent runs on Questflow's infrastructure at a development API endpoint (api-dev.intra-tls2.dctx.link). Payment is required in USDC on the Base Sepolia testnet, with a maximum amount of 100,000 units (likely 0.10 USDC given 6-decimal USDC). The x402 challenge is live and returns a well-formed payment schema. The input/output contract is simple: POST a JSON body with an "input" string field and receive a JSON response with a "response" string field.
Note that this is a development/testnet endpoint (Base Sepolia), not a production mainnet deployment. No OpenAPI spec, dedicated documentation, or usage examples beyond the x402 challenge schema were found. The underlying CoinGecko data capabilities are inferred from the agent description rather than verified through actual response content.
Capabilities
Use cases
- —Querying real-time cryptocurrency prices and market data via natural language
- —Getting exchange and trading volume information for specific tokens
- —Asking about market cap rankings and token metadata
- —Integrating crypto data lookups into autonomous agent workflows with micropayments
Fit
Best for
- —AI agents needing on-demand crypto market data via pay-per-query
- —Developers prototyping x402 payment flows on Base Sepolia testnet
- —Quick natural-language crypto data lookups without managing API keys
Not for
- —Production trading systems requiring mainnet payment rails and SLAs
- —Bulk historical data downloads or streaming price feeds
- —Non-crypto data queries
Quick start
curl -X POST https://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:68355af5edb8edd20e1c362d \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{"input": "What is the current price of Bitcoin?"}'Example
Request
{
"input": "What is the current price of Bitcoin?"
}Response
{
"response": "The current price of Bitcoin (BTC) is $67,432.15 USD, with a 24h trading volume of $28.3B and a market cap of $1.33T."
}Endpoint
Quality
The x402 challenge is live and well-formed with a clear input/output schema, but this is a dev/testnet endpoint with no OpenAPI spec, no dedicated documentation, no usage examples, and no verified response content. The CoinGecko capabilities are inferred solely from the agent description.
Warnings
- —Development/testnet endpoint (Base Sepolia) — not suitable for production use
- —No OpenAPI specification or dedicated documentation available
- —Agent response quality and CoinGecko data freshness are unverified
- —Example response is illustrative and inferred, not captured from actual call
- —USDC asset address 0x036CbD53842c5426634e7929541eC2318f3dCF7e is the Base Sepolia testnet token
Citations
- —x402 challenge is live, returns 402 with payment schema requiring USDC on base-sepoliahttps://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:68355af5edb8edd20e1c362d
- —Agent description states CoinGecko covers 17,000+ crypto assets across 1,000+ exchangeshttps://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:68355af5edb8edd20e1c362d
- —Questflow platform hosts AI clone agents with their own wallets and tokenshttps://api-dev.intra-tls2.dctx.link
- —maxAmountRequired is 100000 units of USDC with payTo address 0xEb22cc45bD3d3E52b32506e2d45B4beE9c78F470https://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:68355af5edb8edd20e1c362d