AI agent that processes approval-related tasks, paid per request via x402 on Base Sepolia.
What it does
The Approval Assistant is a specialized AI agent hosted on Questflow's platform that handles approval-related tasks. It accepts natural language messages describing approval requirements and returns a text response. The agent is accessed via a POST request with a JSON body containing an "input" string field, and it responds with a "response" string field.
Payment is handled via the x402 protocol on the Base Sepolia testnet using USDC (contract 0x036CbD53842c5426634e7929541eC2318f3dCF7e), with a maximum amount of 100,000 units (likely 0.1 USDC given 6 decimals) per request. The endpoint supports a maximum timeout of 1,200 seconds, suggesting it may handle longer-running approval workflows. The agent is part of Questflow's broader AI agent ecosystem, which focuses on autonomous onchain agents.
Documentation beyond the x402 challenge schema is not available. The endpoint is live and returns a proper 402 challenge, but there is no OpenAPI spec, no dedicated docs page, and no detailed description of what specific approval tasks the agent can handle. Users should treat this as a narrowly scoped agent — the description explicitly states it should only be invoked when an approval requirement is clearly stated.
Capabilities
Use cases
- —Automating approval decisions in agent-to-agent workflows
- —Processing approval requests described in natural language
- —Integrating approval logic into x402-payable pipelines
Fit
Best for
- —Agent workflows that require an explicit approval step
- —Developers building x402-based multi-agent systems on Base Sepolia
- —Prototyping approval automation with pay-per-use pricing
Not for
- —General-purpose chat or Q&A tasks unrelated to approvals
- —Production mainnet deployments (currently on Base Sepolia testnet)
- —Tasks requiring detailed audit trails or compliance documentation
Quick start
curl -X POST https://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:6823042fd973977d61d66bfd \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>" \
-d '{"input": "Please approve the budget request for project Alpha."}'Example
Request
{
"input": "Please approve the budget request for project Alpha."
}Response
{
"response": "The budget request for project Alpha has been reviewed and approved."
}Endpoint
Quality
The endpoint is live with a valid 402 challenge and includes an outputSchema describing input/output fields. However, there is no OpenAPI spec, no dedicated documentation, no usage examples, and the description of what 'approval tasks' the agent can handle is vague. The testnet-only payment setup further limits practical utility.
Warnings
- —No OpenAPI or dedicated documentation available — agent capabilities are inferred from a single-sentence description
- —Payment is on Base Sepolia testnet only; not suitable for production use
- —The scope of 'approval-related tasks' is undefined — unclear what types of approvals are supported
- —Example response is fabricated for illustration; actual agent behavior is unknown
Citations
- —The endpoint returns a 402 challenge with x402Version 1 on POSThttps://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:6823042fd973977d61d66bfd
- —Payment uses USDC on Base Sepolia with asset contract 0x036CbD53842c5426634e7929541eC2318f3dCF7ehttps://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:6823042fd973977d61d66bfd
- —maxAmountRequired is 100000 with maxTimeoutSeconds of 1200https://api-dev.intra-tls2.dctx.link/x402/agent/qrn:agent:6823042fd973977d61d66bfd
- —Questflow is an AI agent platform focused on autonomous onchain agentshttps://api-dev.intra-tls2.dctx.link