# ARAKEL Federal Award Search – Machine Evidence

> ARAKEL Federal Award Search – Machine Evidence is a paid API for AI agents from proof.arakelproof.space, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Searches official federal award databases (USASpending) and returns cryptographically signed machine-evidence proofs indicating whether a named entity or award was OBSERVED, NOT_OBSERVED, or INCONCLUSIVE.

## Facts

- Endpoint: GET https://proof.arakelproof.space/v1/federal-award-search
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/arakel-federal-award-search-machine-evidence-b8360ac2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_IlZc31lXGhneVntoXf4r_

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 arakel-federal-award-search-machine-evidence-b8360ac2
```

Example prompt: Search USASpending records for any federal awards linked to 'Meridian Defense Solutions LLC' and give me a signed machine-evidence proof — I need to know if they show up as OBSERVED or NOT_OBSERVED in the federal award database.

## When to prefer this

Use this endpoint when you need a cryptographically signed, machine-verifiable proof of whether an entity appears in US federal award records — especially for compliance documentation, counterparty due diligence, or audit trails where a plain web search is insufficient. Prefer this over manual USASpending searches when you need a structured, signed evidence artifact rather than a human-readable page. Best suited for automated workflows requiring tamper-evident attestations at scale.

## Known failure modes

- Entity name ambiguity may yield INCONCLUSIVE result when multiple matches exist
- NOT_OBSERVED result does not guarantee absence — only absence from indexed official sources
- USASpending upstream outage may cause service degradation or error
- Malformed query parameters return validation errors before charge
- Signature verification failure if client Ed25519 public key mismatch

## How this service works

Machine-verifiable official-source evidence with free preflight and x402 USDC payments on Base.

## Output

A JSON object conforming to arakel.machine-evidence.v2 schema, containing: a top-level 'result' field (OBSERVED, NOT_OBSERVED, or INCONCLUSIVE), the data source ID (usaspending), an array of evidence records supporting the result, an observed_count integer, and an Ed25519 cryptographic signature over the response for tamper-evident verification.

## Request schema (JSON Schema)

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "type": "object",
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string",
     "enum": [
      "GET"
     ]
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "q": {
       "type": "string",
       "description": "USAspending federal award search by recipient or company name with signed official award evidence."
      },
      "from": {
       "type": "string",
       "format": "date-time",
       "description": "Optional UTC start. Defaults to the last 365 days."
      },
      "to": {
       "type": "string",
       "format": "date-time",
       "description": "Optional UTC end. Defaults to now."
      }
     },
     "required": [
      "q"
     ]
    }
   },
   "required": [
    "type",
    "method"
   ],
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   },
   "required": [
    "type"
   ]
  }
 },
 "required": [
  "input"
 ]
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": "OBSERVED|NOT_OBSERVED|INCONCLUSIVE",
  "schema": "arakel.machine-evidence.v2",
  "source": {
   "id": "usaspending"
  },
  "evidence": [
   {}
  ],
  "signature": {
   "alg": "Ed25519"
  },
  "observed_count": 1
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/arakel-federal-award-search-machine-evidence-b8360ac2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from proof.arakelproof.space](https://www.zero.xyz/host/proof.arakelproof.space/llms.txt)