Search cryptocurrency prices, market cap, 24h volume, and price changes via a pay-per-call x402 agent.
What it does
This x402-enabled endpoint exposes a Questflow-hosted AI agent that functions as a cryptocurrency market data dashboard. Users send a text query (e.g., a coin name or symbol) via HTTP POST and receive real-time price information, market capitalization, 24-hour trading volume, and price change data in return.
The endpoint uses the x402 payment protocol on the Base Sepolia testnet, accepting USDC payments with a maximum charge of 500,000 units (likely 0.50 USDC given 6-decimal USDC). The request schema is minimal: a single `input` string field containing the user's query. The response is a single `response` string from the agent. There is no OpenAPI spec, no dedicated documentation page, and no detailed API reference beyond the x402 challenge metadata and the output schema embedded in it.
The service is part of the Questflow platform, which describes itself as an AI agent economy aggregating data from multiple onchain markets and exchanges. The specific agent behind this endpoint appears to be a crypto price lookup tool rather than a trading agent. Because the endpoint is on a development subdomain (`api-dev`) and uses a testnet (Base Sepolia), it should be treated as a pre-production or experimental service.
Capabilities
Use cases
- —Looking up the current price and market cap of a cryptocurrency by name or symbol
- —Checking 24-hour trading volume and price changes for a specific token
- —Integrating real-time crypto market data into an autonomous agent workflow
- —Paying per query for crypto market information without API key registration
Fit
Best for
- —Quick ad-hoc cryptocurrency price checks via natural language
- —Agent-to-agent crypto data retrieval using x402 micropayments
- —Developers experimenting with x402 payment protocol on testnet
Not for
- —Production-grade financial applications (endpoint is on dev/testnet)
- —Historical price data or charting
- —Executing trades or managing portfolios
Quick start
curl -X POST https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68ee196ed8b26d2e2dffacf0 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>" \
-d '{"input": "What is the current price of Bitcoin?"}'Example
Request
{
"input": "What is the current price of Ethereum?"
}Response
{
"response": "Ethereum (ETH) is currently trading at $3,450.12 with a market cap of $415.2B, 24h volume of $18.7B, and a 24h price change of +2.3%."
}Endpoint
Quality
No OpenAPI spec, no documentation pages (all return 404), and no example responses are available. The only structured information comes from the x402 challenge metadata, which provides a minimal input/output schema. The endpoint is on a dev subdomain using a testnet, suggesting it is not production-ready. The response example above is entirely inferred.
Warnings
- —Endpoint is on a development subdomain (api-dev) and uses Base Sepolia testnet — not suitable for production use
- —No OpenAPI spec or API documentation available; all /docs, /api, /pricing, /README paths return 404
- —The example response is inferred from the description; no actual response sample was available
- —maxAmountRequired of 500000 units — actual cost in USDC is unclear without confirming decimal precision
- —Agent response format and reliability are unknown
Citations
- —The endpoint uses x402 protocol version 1 on base-sepolia network with USDC asset at address 0x036CbD53842c5426634e7929541eC2318f3dCF7ehttps://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68ee196ed8b26d2e2dffacf0
- —maxAmountRequired is 500000 with maxTimeoutSeconds of 1200https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68ee196ed8b26d2e2dffacf0
- —The input schema accepts a single string field 'input' described as 'Your message to the agent'https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68ee196ed8b26d2e2dffacf0
- —Questflow describes itself as an AI agent economy aggregating Polymarket, Pump.fun, OKX, Opinion Labs and other onchain marketshttps://api-dev.intra-tls2.dctx.link