Pay-per-query Exa search agent via x402 on Base Sepolia, powered by Questflow.
What it does
This endpoint exposes an Exa search agent behind an x402 paywall hosted by Questflow. Callers send a POST request with a JSON body containing an `input` string (your search query or message to the agent) and receive a text `response` from the agent. Payment is handled via the x402 protocol using USDC on the Base Sepolia testnet.
The x402 challenge confirms the endpoint is live and accepts the "exact" payment scheme. The maximum amount required per call is 100,000 units of the USDC asset (contract `0x036CbD53842c5426634e7929541eC2318f3dCF7e`) on Base Sepolia, with a timeout of up to 1,200 seconds. The payment recipient address is `0x836534FBf04785FC6e4859E0279706436895c717`.
Questflow is a platform for creating autonomous AI agents ("Clones") that aggregate multiple onchain and offchain data sources. This particular agent wraps Exa's search capabilities, though no further documentation on the agent's behavior, search parameters, or result formatting is available beyond the outputSchema in the x402 challenge. Because this runs on a testnet (Base Sepolia), it is likely intended for development and experimentation rather than production use.
Capabilities
Use cases
- —Querying web search results through an AI agent with per-request crypto micropayments
- —Integrating Exa-powered search into autonomous agent workflows that settle on Base Sepolia
- —Prototyping x402-based search services in a testnet environment
Fit
Best for
- —Developers experimenting with x402 payment-gated search
- —Agent-to-agent search queries settled with USDC on Base Sepolia
- —Prototyping pay-per-call AI search integrations
Not for
- —Production search workloads requiring mainnet settlement
- —Users who need detailed search parameters like filters, date ranges, or pagination
- —Free or unauthenticated search access
Quick start
curl -X POST https://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:68db407a7fbdb84f70af1288 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>" \
-d '{"input": "latest news on Ethereum upgrades"}'Example
Request
{
"input": "latest news on Ethereum upgrades"
}Response
{
"response": "Here are the latest results regarding Ethereum upgrades: ..."
}Endpoint
Quality
The endpoint is live (402 challenge confirmed) with a clear outputSchema specifying input/output fields, but there is no OpenAPI spec, no dedicated documentation, no usage examples, and no details about what Exa search features are exposed. The testnet-only payment and sparse metadata limit confidence.
Warnings
- —Runs on Base Sepolia testnet — not suitable for production use
- —No dedicated API documentation or OpenAPI spec available
- —Agent behavior and Exa search parameters are undocumented beyond a single 'input' string field
- —Example response is inferred from the outputSchema, not observed
Citations
- —The x402 challenge returns status 402 with USDC on Base Sepolia, maxAmountRequired 100000, and payTo 0x836534FBf04785FC6e4859E0279706436895c717https://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:68db407a7fbdb84f70af1288
- —The outputSchema specifies a POST method with a required 'input' string field and a 'response' string outputhttps://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:68db407a7fbdb84f70af1288
- —Questflow is a platform for creating autonomous AI agents that aggregate onchain marketshttps://api-dev.intra-tls2.dctx.link