x402base-sepoliaquality 0.25

x402-payable research agent by Questflow — send a prompt, get a researched response via USDC on Base Sepolia.

Price
0.5 USDC / call
Protocol
x402
Verified
no
Endpoint
https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68edbf049a89cedc559091b4

What it does

The Researcher endpoint is an x402-protocol AI agent hosted by Questflow. It accepts a text prompt via HTTP POST and returns a research-oriented response from the agent. Payment is handled inline using the x402 payment header, requiring USDC on the Base Sepolia testnet. The maximum payment amount is 0.5 USDC (500000 in token units), and the endpoint allows up to 1200 seconds for processing.

Questflow is a platform focused on autonomous AI agents ("Clones") that operate across onchain markets such as Polymarket, Pump.fun, OKX, and Opinion Labs. The Researcher agent appears to be one such agent exposed via the x402 paywall for programmatic, pay-per-call access. The input schema is simple: a single string field called "input" containing your message to the agent. The output is a single string field called "response" with the agent's reply.

Documentation is minimal — there is no OpenAPI spec, no dedicated docs page, and no detailed description of what "Researcher" specifically does beyond the generic label. The endpoint is on a development subdomain (api-dev), suggesting it may be a staging or testnet deployment rather than a production service. Pricing, rate limits, and detailed capabilities are not documented.

Capabilities

x402-paymentai-agentresearch-queryusdc-base-sepoliahttp-postjson-response

Use cases

  • —Sending research questions to an AI agent and receiving text responses via a single API call
  • —Integrating a pay-per-use research agent into an autonomous agent pipeline using x402
  • —Testing x402 payment flows on Base Sepolia testnet with a live agent endpoint

Fit

Best for

  • —Developers experimenting with x402 payment protocol integrations
  • —Agent-to-agent workflows that need a research sub-agent callable via HTTP
  • —Prototyping pay-per-call AI services on Base Sepolia testnet

Not for

  • —Production workloads requiring guaranteed uptime (this is a dev/testnet endpoint)
  • —Users who need detailed, documented research methodology or source citations from the agent
  • —Free or non-crypto payment access to AI research capabilities

Quick start

curl -X POST https://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68edbf049a89cedc559091b4 \
  -H 'Content-Type: application/json' \
  -H 'X-PAYMENT: <x402_payment_header>' \
  -d '{"input": "What are the latest trends in DeFi lending?"}'

Example

Request

{
  "input": "What are the latest trends in DeFi lending?"
}

Response

{
  "response": "Recent trends in DeFi lending include the rise of real-world asset (RWA) collateralization, modular lending protocols, and cross-chain lending markets..."
}

Endpoint

URLhttps://api-dev.intra-tls2.dctx.link/x402/swarm/qrn:swarm:68edbf049a89cedc559091b4
Transporthttp
Protocolx402
Pay to0x4709d0C52cD572bfD77876c29DB8683150FA38B6
CurrencyUSDC

Quality

0.25/ 1.00

No OpenAPI spec, no docs, no examples, and the endpoint is on a dev subdomain using testnet tokens. The only structured information comes from the x402 challenge payload, which provides a minimal input/output schema. The agent's actual research capabilities are entirely undocumented.

Warnings

  • —Endpoint is on a development subdomain (api-dev) and uses Base Sepolia testnet — not production-ready
  • —No OpenAPI specification or documentation pages found (all /docs, /api, /pricing, /README return 404)
  • —Agent behavior and research methodology are completely undocumented; 'Researcher' is the only descriptor
  • —The example response is inferred/fabricated since no actual successful response was captured
  • —maxAmountRequired of 500000 units — actual token decimals and real cost unclear without USDC contract context

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 18:54:18Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/AJCDXQ