# Services from api-production-853c.up.railway.app on Zero

> api-production-853c.up.railway.app serves 6 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/api-production-853c.up.railway.app
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/api-production-853c.up.railway.app/health.json

## Services

- [MatrixFold Crypto Token Risk Brief](https://www.zero.xyz/c/api-production-853c-up-railway-app-b2593b69/llms.txt): $0.02/call via x402. Generates an explainable risk assessment brief for a crypto token by checking DexScreener market/liquidity data and GoPlus/RugCheck security signals, returning a risk score, risk level, red flags, and recommended next checks.
- [MatrixFold Social Post Validator](https://www.zero.xyz/c/api-production-853c-up-railway-app-7ca958a5/llms.txt): $0.003/call via x402. Validates X/Twitter, LinkedIn, and Xiaohongshu posts for platform compliance before publishing, returning rule codes, risk score, and suggested fixes.
- [MatrixFold X/Twitter Preflight Validator](https://www.zero.xyz/c/api-production-853c-up-railway-app-37760eea/llms.txt): $0.004/call via x402. Pre-validates AI-generated X/Twitter post payloads before submission, checking text length, hashtags, links, media prerequisites, and unsupported fields to prevent 400/422 errors.
- [MatrixFold Social Payload Repair API](https://www.zero.xyz/c/api-production-853c-up-railway-app-aab15bcb/llms.txt): $0.006/call via x402. Repairs invalid X/Twitter, LinkedIn, and Xiaohongshu post payloads by returning corrected JSON, validation reports, fixed rule codes, remaining risks, and a machine-readable diff for safe retry.
- [MatrixFold X API Failure Explainer](https://www.zero.xyz/c/api-production-853c-up-railway-app-0bc4a4b1/llms.txt): $0.004000/call via x402. Classifies failed X (Twitter) create-post API responses into error categories and returns retry guidance and repair hints for AI agents
- [MatrixFold Social Publishing Payload Compiler](https://www.zero.xyz/c/api-production-853c-up-railway-app-5bc737e9/llms.txt): $0.01/call via x402. Compiles long-form content, intent, and source material into platform-ready JSON payloads for X/Twitter, LinkedIn, and Xiaohongshu

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)