# Multi-Source Fact Bundle

> Multi-Source Fact Bundle is a paid API for AI agents from phion.systems, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-20).

Bundles observations about a fact from multiple independent sources, exposing where sources agree and disagree

## Facts

- Endpoint: POST https://phion.systems/v1/paid/trust/multi-source-fact-bundle?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/multi-source-fact-bundle-d057933d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bRdzUHTPO_1zBNIsqSgus

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 multi-source-fact-bundle-d057933d -d '<json body>'
```

Example prompt: Cross-check whether multiple independent sources agree that Acme Corp's CEO is Jane Smith — bundle all source observations and show me where they agree or conflict.

## When to prefer this

Use this endpoint when you need to go beyond a single-source lookup and explicitly surface consensus or conflict across independent observations. It is especially valuable when an agent must assess trustworthiness of a claim, detect misinformation, or present a user with a balanced view of what multiple authoritative sources report. Prefer this over single-source retrieval or simple search when the reliability or contested nature of a fact matters to the downstream decision.

## Known failure modes

- Insufficient sources available to form a meaningful bundle — returns low-coverage warning
- Sources return ambiguous or non-comparable observations — disagreement cannot be resolved
- Queried fact is too ambiguous to retrieve consistent observations across sources
- Payment not processed — request rejected with 402 status
- Input schema incomplete or malformed — request rejected with validation error

## How this service works

Bundle independent source observations while exposing agreement and disagreement

## Output

Returns a structured bundle containing each source's individual observation on the queried fact, an explicit agreement or disagreement signal across sources, coverage metadata, and confidence levels — enabling agents to understand not just what sources say but where they converge or diverge.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input",
  "output"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "additionalProperties": true
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "example"
   ],
   "properties": {
    "example": {
     "type": "object",
     "additionalProperties": true
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/multi-source-fact-bundle-d057933d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from phion.systems](https://www.zero.xyz/host/phion.systems/llms.txt)