# Services from synap.linkrra.com on Zero

> synap.linkrra.com 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/synap.linkrra.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/synap.linkrra.com/health.json

## Services

- [Synap AI Chat Completions (x402)](https://www.zero.xyz/c/synap-ai-chat-completions-x402-bc52c44c/llms.txt): $0.001/call via x402. OpenAI-compatible chat completions using qwen3-coder-30b with pay-per-call micropayments via x402 and zero data retention
- [Synap Chat Completions — OpenAI-compatible Inference API](https://www.zero.xyz/c/synap-chat-completions-openai-compatible-inference-api-4bbaf4a2/llms.txt): $0.001/call via x402. Runs LLM chat completions using Qwen3-Coder-30B via an OpenAI-compatible endpoint with zero data retention and per-call micropayment via x402
- [Synap TTS — Text-to-Speech via x402](https://www.zero.xyz/c/synap-tts-text-to-speech-via-x402-cdf38635/llms.txt): $0.01/call via x402. Converts text input to speech audio, returning a WAV file, billed per-call via x402 micropayment at $0.01 USDC.
- [Synap Billing Top-Up via x402](https://www.zero.xyz/c/synap-billing-top-up-via-x402-f3d0cbac/llms.txt): $1/call via x402. Tops up a Synap account balance by processing a $1 USDC micropayment via the x402 payment protocol, returning the updated credit balance.

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)