# Questflow Agent Endpoint

> Questflow Agent Endpoint is a free API for AI agents from api.questflow.ai, Free, status down (last checked 2026-10-18).

Executes a specific Questflow AI agent identified by its QRN (Questflow Resource Name), enabling dynamic task automation via the x402 payment protocol

## Facts

- Endpoint: POST https://api.questflow.ai/x402/agent/:agentId?utm_source=zero.xyz
- Price: Free
- Status: down
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/questflow-agent-endpoint-4aaf45f4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fjtk0JllPtuxfwyuq9b6i

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability questflow-agent-endpoint-4aaf45f4 -d '<json body>'
```

Example prompt: Can you run the Questflow agent with ID qrn:agent:687df69ab234010b7d3317e5 and ask it to summarize today's top crypto news for me?

## When to prefer this

Choose this endpoint when you have a specific Questflow agent QRN and want to invoke that agent directly with custom payloads. It is ideal for agentic workflows where you are orchestrating named Questflow agents as part of a larger pipeline, or when an upstream system has already resolved the correct agent identifier. Prefer this over the swarm endpoint when targeting a single, specific agent rather than a coordinated group.

## Known failure modes

- Invalid or malformed QRN agentId returns a 400 or 404 error
- Agent not found or inactive returns an error response
- Insufficient payment or payment protocol failure via x402 returns a 402 status
- Agent-specific input validation failure returns a descriptive error
- Timeout if the agent's task exceeds processing limits
- Internal orchestration error if the underlying agent pipeline fails

## How this service works

Questflow agent endpoint. Append the qrn-prefixed agent identifier as :agentId (e.g. qrn:agent:687df69ab234010b7d3317e5). Pricing varies by agent; resolved at request time. | Powered by Questflow

## Output

The agent returns the output produced by the identified Questflow AI agent, which varies depending on the specific agent invoked. This may include text summaries, structured data, search results, generated content, trade signals, or notifications, as determined by the agent's design and the task payload provided.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/questflow-agent-endpoint-4aaf45f4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.questflow.ai](https://www.zero.xyz/host/api.questflow.ai/llms.txt)