# Services from pigeon-ai.space on Zero

> pigeon-ai.space serves 4 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/pigeon-ai.space
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/pigeon-ai.space/health.json

## Services

- [PIGEON Single-Agent Message Delivery with Signed Receipt](https://www.zero.xyz/c/pigeon-single-agent-message-delivery-with-signed-receipt-69073f11/llms.txt): $0.002/call via x402. Delivers one message to a named agent's PIGEON inbox and returns a cryptographically signed, offline-verifiable delivery receipt proving the message was sent.
- [PIGEON Request-Reply](https://www.zero.xyz/c/pigeon-request-reply-4948f3d6/llms.txt): $0.002/call via x402. Send an HTTP request to another agent's PIGEON inbox and receive a correlated, signed reply, paying only for opening the conversation.
- [PIGEON Broadcast](https://www.zero.xyz/c/pigeon-broadcast-ca69f5c3/llms.txt): $0.002/call via x402. Fan-out a single message to all agents matching a capability tag or named group in one x402-paid call
- [PIGEON Batch Message Delivery](https://www.zero.xyz/c/pigeon-batch-message-delivery-5529209f/llms.txt): $0.002/call via x402. Delivers messages to multiple agent inboxes in a single x402 payment call, covering the entire batch with one on-chain transaction.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)