# Farcaster Profile Fusion API

> Farcaster Profile Fusion API is a paid API for AI agents from api.agentstools.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Returns a complete fused Farcaster profile by FID or username, including identity, verified wallets, social stats, and account metadata in one call.

## Facts

- Endpoint: GET https://api.agentstools.dev/farcaster/profile
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/farcaster-profile-fusion-api-2c018078
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9I-NRly8VsbPWVgAZJtHa

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 farcaster-profile-fusion-api-2c018078
```

Example prompt: Pull the full Farcaster profile for username 'vitalik.eth' — I want their bio, profile picture, all verified wallet addresses, follower and following counts, and how old their account is.

## When to prefer this

Use this endpoint when you need a complete, fused Farcaster identity snapshot in one call rather than making four or five separate hub reads. Ideal when you need both social stats (followers, casts) and on-chain identity (verified wallets, custody address) together. Prefer this over raw Farcaster hub APIs when you want a normalized, ready-to-use object without assembling multiple responses.

## Known failure modes

- Neither fid nor username provided — returns error requiring at least one identifier
- Unknown FID or username — returns 404 or empty result if user does not exist on Farcaster
- Invalid FID format (non-integer or less than 1) — returns validation error
- Payment not included or insufficient — returns 402 Payment Required
- Rate limit exceeded — returns 429 Too Many Requests
- Farcaster hub unavailable — may return 503 or partial data

## How this service works

One-call Farcaster profile fusion. Give one of fid or username and get back the full profile (display name, bio, picture, url, location, socials), the primary Ethereum address, every verified on-chain wallet, the custody address, following and follower and cast counts, and the account age — the fused object that replaces four or five raw hub reads.

## Output

A fused profile object containing: display name, bio, profile picture URL, profile URL, location, social links, primary Ethereum address, all verified on-chain wallet addresses, custody address, following count, follower count, cast count, and account age — all in a single response.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "fid": {
       "type": "integer",
       "minimum": 1,
       "description": "Farcaster ID (FID), a positive integer"
      },
      "username": {
       "type": "string",
       "description": "Farcaster username (fname or ENS), without the at-sign"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/farcaster-profile-fusion-api-2c018078/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.agentstools.dev](https://www.zero.xyz/host/api.agentstools.dev/llms.txt)