# Agent Reputation Evidence

> Agent Reputation Evidence 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).

Returns an evidence-bounded reputation assessment for an AI agent, including confidence score, coverage metrics, and explicit limitations on what the evidence supports

## Facts

- Endpoint: POST https://phion.systems/v1/paid/trust/agent-reputation-evidence?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/agent-reputation-evidence-fd2b4b27
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JeoxhlNvfVYX4-voq0njg

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 agent-reputation-evidence-fd2b4b27 -d '<json body>'
```

Example prompt: Before I hand off this task to the external agent with ID agent-9f2a3b, can you check its reputation and tell me how confident you are in the assessment and what evidence gaps exist?

## When to prefer this

Choose this endpoint when an AI agent or orchestrator needs a structured, evidence-bounded trust assessment before delegating tasks or authorizing interactions with another agent. Unlike simple reputation lookups, this endpoint explicitly surfaces confidence levels and coverage gaps, making it suitable for compliance workflows, risk-sensitive delegation, and multi-agent orchestration where uncertainty must be quantified rather than hidden.

## Known failure modes

- Unknown agent identifier returns low-confidence result or error indicating no evidence found
- Insufficient evidence coverage results in high-uncertainty score rather than a hard failure
- Malformed input schema may return a 400-level error
- Stale or sparse evidence may yield a result with wide confidence intervals and prominent limitations
- Service unavailability returns a 5xx error with no signed receipt

## How this service works

Evidence-bounded reputation assessment with confidence, coverage and explicit limitations

## Output

Returns a structured reputation assessment containing a scored trust rating, a confidence level reflecting evidence quality and completeness, a coverage report indicating which behavioral dimensions are supported by evidence, and an explicit limitations section describing what the assessment cannot conclude. The result is designed to be machine-readable and bounded — it clearly delineates what is known versus uncertain.

## 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/agent-reputation-evidence-fd2b4b27/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)