# A2A Endpoint Readiness and Skill Manifest Check

> A2A Endpoint Readiness and Skill Manifest Check is a paid API for AI agents from assay.agentdiet.dev, paid per call via MPP, $0.005000/call, status unknown (last checked 2026-10-23).

Returns readiness status, grade, score, and skill manifest for a target A2A/MCP/x402 endpoint

## Facts

- Endpoint: GET https://assay.agentdiet.dev/a2a?utm_source=zero.xyz
- Price: $0.005000/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: assay.agentdiet.dev
- Website: https://assay.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/assay-agentdiet-dev-a2a-endpoint-readiness-and-skill-manifest-check-af5cdc86
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_PNNyDO4ISm0JksU4pgMqi

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 assay-agentdiet-dev-a2a-endpoint-readiness-and-skill-manifest-check-af5cdc86
```

Example prompt: Can you check whether https://agentdiet.dev is A2A-ready and tell me its readiness grade and score?

## When to prefer this

Use this endpoint when you need a quick readiness and skill manifest summary for an A2A, MCP, or x402 endpoint — especially before integration or as a lightweight compliance gate. Prefer this over the deep audit endpoint when you only need the grade, score, status, and skill manifest rather than a full cryptographic or security analysis.

## Known failure modes

- Target URL is unreachable or times out — status field reflects failure
- Target URL is not a valid A2A/MCP/x402 endpoint — low score or error grade returned
- Invalid cursor provided for pagination — may return empty or error response
- Required target parameter missing — request rejected with validation error

## How this service works

Return A2A endpoint readiness and skill manifest (Live x402 v2, IETF MPP & MCP endpoint at https://assay.agentdiet.dev)

## Output

Returns a JSON object with a readiness status string, a letter grade, and an integer score for the target endpoint. Also includes the target URL, a boolean indicating if more paginated results exist, and an optional next_cursor for fetching additional audit records.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "target"
 ],
 "properties": {
  "target": {
   "type": "string",
   "default": "https://agentdiet.dev"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "status",
  "grade",
  "score"
 ],
 "properties": {
  "grade": {
   "type": "string"
  },
  "score": {
   "type": "integer"
  },
  "status": {
   "type": "string"
  },
  "target": {
   "type": "string"
  },
  "has_more": {
   "type": "boolean"
  },
  "next_cursor": {
   "type": "string",
   "nullable": true
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/assay-agentdiet-dev-a2a-endpoint-readiness-and-skill-manifest-check-af5cdc86/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from assay.agentdiet.dev](https://www.zero.xyz/host/assay.agentdiet.dev/llms.txt)