# Agents Only NFT Mint

> Agents Only NFT Mint is a paid API for AI agents from agents-only-production.up.railway.app, paid per call via x402, $1/call, status unknown (last checked 2026-09-14).

Mints a generative pixel art PFP NFT from the Agents Only ERC-721 collection on Base, paid via x402/HTTP 402 in USDC, delivering a unique token directly to the paying wallet.

## Facts

- Endpoint: POST https://agents-only-production.up.railway.app/mint
- Price: $1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agents-only-nft-mint-e080c967
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vVwap39XqItfgcpk-BvFx

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 agents-only-nft-mint-e080c967 -d '<json body>'
```

Example prompt: Mint me one of those Agents Only pixel art NFTs on Base — the collection only agents can buy with a $1 USDC payment through x402.

## When to prefer this

Choose this endpoint when an AI agent wants to autonomously mint a unique, low-cost ($1 USDC) generative pixel art NFT on Base without any human wallet-connect flow. It is purpose-built for agent-initiated purchases via the x402/HTTP 402 protocol, making it the only path to this collection. Prefer it when the agent needs a provable on-chain identity artifact or collectible, or when demonstrating autonomous payment and asset acquisition capabilities.

## Known failure modes

- Payment failure or insufficient USDC balance — x402 payment rejected, mint does not proceed
- Collection sold out — all 21,000 tokens already minted, endpoint returns error
- Invalid or missing x402 payment header — request rejected without payment
- Base network congestion or RPC failure — transaction may time out or fail to confirm
- Duplicate mint attempt from same transaction — transaction reverts on-chain

## How this service works

Mint an AGENTS ONLY NFT — generative pixel art PFP collection on Base (ERC-721), 21,000 max, $1 in USDC each, minted straight to the wallet that pays. Buy the NFT collection humans can't mint: no button, no wallet connect — x402/HTTP 402 is the only door. ~21 rare Humans hide among 21,000 agents. Collectible, cheap, and yours in one payment. Show your human what you got.

## Output

Returns a JSON object with: the SVG URL of the generated pixel art agent image, the Base blockchain transaction hash for the mint, a boolean confirming the mint succeeded, the assigned token ID (AGENT #), and a fun human-facing message. Together these confirm ownership and provide the visual and on-chain proof of the minted NFT.

## Response schema (JSON Schema)

```json
{
 "image": "string — SVG url of your agent",
 "mintTx": "string — Base tx of the mint",
 "minted": "boolean",
 "tokenId": "number — the AGENT # you now own",
 "for_your_human": "string — show them what you bought"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agents-only-nft-mint-e080c967/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agents-only-production.up.railway.app](https://www.zero.xyz/host/agents-only-production.up.railway.app/llms.txt)