# Services from gpt.558686.xyz on Zero

> gpt.558686.xyz serves 14 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/gpt.558686.xyz
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/gpt.558686.xyz/health.json

## Services

- [GPT Smart Contract Audit](https://www.zero.xyz/c/gpt-smart-contract-audit-44f0d97f/llms.txt): $2.5/call via x402. Audits a smart contract for security vulnerabilities, bugs, and best-practice violations using GPT-powered analysis
- [GPT Prompt Guard](https://www.zero.xyz/c/gpt-prompt-guard-c4bd57dd/llms.txt): $0.05/call via x402. Analyzes and guards an input prompt against unsafe, malicious, or policy-violating content before passing it to an LLM
- [GPT Pro Translate](https://www.zero.xyz/c/gpt-pro-translate-d839d27c/llms.txt): $0.3/call via x402. Translates text from one language to another using GPT-based AI translation
- [GPT Code Audit Service](https://www.zero.xyz/c/gpt-code-audit-service-05a05e84/llms.txt): $1.5/call via x402. Performs an AI-powered security and quality audit of submitted source code, returning findings and recommendations.
- [GPT SEO Content Generator](https://www.zero.xyz/c/gpt-seo-content-generator-b94984de/llms.txt): $0.8/call via x402. Generates SEO-optimized content based on a given topic or prompt input
- [GPT Chat Completions via gpt.558686.xyz](https://www.zero.xyz/c/gpt-chat-completions-via-gpt-558686-xyz-4c002c64/llms.txt): $0.05/call via x402. Accepts a natural language prompt and returns an AI-generated chat completion response via a GPT-compatible endpoint.
- [GPT Schema Extractor](https://www.zero.xyz/c/gpt-schema-extractor-b07d4b02/llms.txt): $0.5/call via x402. Extracts structured schema definitions from a given text prompt or document input using AI
- [gpt.558686.xyz Chat](https://www.zero.xyz/c/gpt-558686-xyz-chat-3faa9988/llms.txt): $0.05/call via x402. Sends a prompt to a GPT-based chat endpoint and returns an AI-generated text response
- [GPT Document Summary](https://www.zero.xyz/c/gpt-document-summary-ab7f389e/llms.txt): $0.5/call via x402. Summarizes a document or text input into a concise summary using GPT-based AI
- [GPT Research Endpoint](https://www.zero.xyz/c/gpt-research-endpoint-e31382fd/llms.txt): $2/call via x402. Performs AI-powered research tasks given a natural language prompt, returning synthesized findings
- [GPT Trial Endpoint](https://www.zero.xyz/c/gpt-trial-endpoint-49f594e3/llms.txt): $0.01/call via x402. Provides a pay-per-call GPT-based AI text generation or task completion trial via a simple prompt-in, response-out interface.
- [GPT 558686 Guard TX](https://www.zero.xyz/c/gpt-558686-guard-tx-7a48d428/llms.txt): $0.15/call via x402. Runs a guard/safety check on a transaction or prompt input, returning a validation or moderation result
- [GPT 558686 Data Insights](https://www.zero.xyz/c/gpt-558686-data-insights-d485b12b/llms.txt): $1/call via x402. Returns AI-generated data insights based on a text prompt or task input
- [gpt.558686.xyz x402 Ping](https://www.zero.xyz/c/gpt-558686-xyz-x402-ping-51b10511/llms.txt): $0.002/call via x402. A connectivity and liveness check endpoint for the gpt.558686.xyz x402-enabled API service

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)