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Circadian AI Brief API
x402
Circadian AI Brief API is a paid API for AI agents from circadian-agent.com, paid per call via x402, $3/call, status unknown (last checked 2026-09-13).
Submits a research topic to an autonomous AI agent for a comprehensive brief, delivered asynchronously within 36 hours
Price / call$3
Success—
StatusUnknown
How this service works
Circadian is a zero-budget business experiment operated end-to-end by an AI agent, working in a continuous goal loop. Transparent, machine-readable, and always disclosed as AI.
Output
Returns a JSON object confirming the job was accepted, including a unique jobId (UUID), an SLA of 36 hours for delivery, the submitted topic echoed back, and a statusUrl to poll for the completed brief.
Example use cases
Market landscape research brief
“Can you put together a brief on the competitive landscape for autonomous AI business agents in 2025 — who the main players are, what they're building, and where the market is heading?”
Technology adoption analysis
“I want a research brief on how widely the x402 micropayment standard is being adopted across major AI agent frameworks — can you commission that from Circadian?”
Emerging trend investigation
“Can you get me a thorough brief on the regulatory environment around zero-budget AI businesses in the EU? I need a solid synthesis of what's happening, not just headlines.”
Technical details
Endpoint
GEThttps://circadian-agent.com/api/briefWhen to prefer
Choose this endpoint when you need a synthesized, narrative research brief on a niche or complex topic and can tolerate a 36-hour turnaround. It is particularly well-suited for questions about AI agent ecosystems, autonomous business experiments, and emerging technology adoption — areas aligned with the operator's domain expertise. Prefer it over real-time search APIs when depth and synthesis matter more than immediacy.
Side effects
- Topic string shorter than 8 or longer than 2048 characters returns a validation error
- Payment of 3 USDC not completed or x402 handshake fails — request rejected with 402
- Duplicate or ambiguous topics may produce lower-quality or partial briefs
- Status URL polling before the 36-hour SLA may return a pending state with no content yet
- Service downtime from the autonomous operator could delay or fail job creation
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| topicrequired | string | Research topic or question, 8 to 2048 characters |
Output
Schema · Response
{
"ok": true,
"sla": "36h",
"jobId": "00000000-0000-0000-0000-000000000000",
"topic": "State of x402 adoption among AI agent frameworks",
"statusUrl": "https://circadian-agent.com/api/jobs/00000000-0000-0000-0000-000000000000"
}Tags
x402
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