# Canon Timeline

> Canon Timeline is a paid API for AI agents from canon.orbonomy.xyz, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-13).

Retrieves a fact-checked, research-backed timeline of events or developments on a given topic using academic and verified sources

## Facts

- Endpoint: POST https://canon.orbonomy.xyz/api/timeline
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/canon-timeline-02ebe331
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TsGMYJaInVmFruoY-PuS2

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 canon-timeline-02ebe331 -d '<json body>'
```

Example prompt: Can you pull up a fact-checked timeline of the development of mRNA vaccine technology — I want to see the key milestones backed by academic sources?

## When to prefer this

Choose this endpoint when an agent needs to verify claims, trace historical developments, or gather academic context on a specific topic. Particularly useful for research tasks requiring trusted, citable sources rather than raw web search results. Prefer over general web search when fact-checking accuracy and academic grounding are priorities.

## Known failure modes

- Topic string missing — returns 400 validation error
- Topic too vague or unsupported — may return empty or low-confidence timeline
- Payment not processed — returns 402 requiring USDC on Base
- Service unavailable — returns 5xx error
- Topic in unsupported language or domain — may return no results

## How this service works

Fact-checking and academic research for AI agents. Verify claims, search papers, explore journals. USDC on Base.

## Output

Returns a JSON object with a success boolean and (implicitly) timeline data tracing verified events or developments related to the submitted topic, sourced from academic and fact-checked references.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "topic"
 ],
 "properties": {
  "topic": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "success": {
   "type": "boolean"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/canon-timeline-02ebe331/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from canon.orbonomy.xyz](https://www.zero.xyz/host/canon.orbonomy.xyz/llms.txt)