# ERC-8004 Reputation Intelligence

> ERC-8004 Reputation Intelligence is a paid API for AI agents from phion.systems, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-21).

Aggregates diverse verified observations to produce an ERC-8004-compliant reputation score, automatically abstaining when sample size is too low to draw reliable conclusions.

## Facts

- Endpoint: POST https://phion.systems/v1/paid/trust/erc8004-reputation-intelligence?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/erc-8004-reputation-intelligence-33f7defb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_eoVrl2t0RO0s6uGQJKGj9

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 erc-8004-reputation-intelligence-33f7defb -d '<json body>'
```

Example prompt: Can you pull the ERC-8004 reputation intelligence score for this agent address — I want to see the aggregated trust score, confidence level, and whether there's enough observation data to make a reliable call?

## When to prefer this

Choose this endpoint when you need an ERC-8004 standard-compliant reputation assessment that explicitly handles low-sample scenarios by abstaining rather than producing unreliable scores. It is particularly suited for blockchain and agentic contexts where trustworthiness signals must be derived from multiple verified observation sources and where false confidence is worse than no answer. Prefer it over generic reputation APIs when standards compliance, mandatory abstention behavior, and multi-source aggregation are required.

## Known failure modes

- Insufficient observations trigger mandatory abstention rather than a score — agent receives an abstention flag instead of a numeric result
- Entity not found or unrecognized identifier returns an error or empty observation set
- Input schema is minimal so malformed or missing entity identifiers may cause validation failures
- Low crawl quality score (0.40) suggests documentation gaps that may cause unexpected parameter behavior
- Network or upstream data source unavailability may result in partial or stale observation aggregation

## How this service works

Aggregate diverse verified observations with mandatory low-sample abstention

## Output

Returns an ERC-8004-compliant reputation intelligence object containing an aggregated reputation score derived from diverse verified observations, a confidence level, coverage metadata indicating how many sources contributed, and an explicit abstention signal when the sample size falls below the minimum threshold for reliable scoring.

## 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/erc-8004-reputation-intelligence-33f7defb/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)