MCP server

POSTFACT — Resolve Ambiguous Side Effects Before Retry

io.github.GSterlingPress/postfact

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Resolve whether an uncertain side-effecting action completed before software retries it.

Website Source

At a glance

Type

MCP server

Publisher

Not verified

Status

Working at last check

Tools

1

Token cost

About 252 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http postfact https://postfact-api-production.up.railway.app/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.postfact]
url = "https://postfact-api-production.up.railway.app/mcp"

Gemini CLI

{"mcpServers":{"postfact":{"httpUrl":"https://postfact-api-production.up.railway.app/mcp"}}}

Cursor

{"mcpServers":{"postfact":{"url":"https://postfact-api-production.up.railway.app/mcp"}}}

VS Code

{"servers":{"postfact":{"type":"http","url":"https://postfact-api-production.up.railway.app/mcp"}}}

Antigravity

agy mcp add postfact https://postfact-api-production.up.railway.app/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"postfact","server_url":"https://postfact-api-production.up.railway.app/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"postfact","server_url":"https://postfact-api-production.up.railway.app/mcp"}

Tools

• resolve_outcome ~252 tokens
  Call after a side-effecting API/tool action fails ambiguously and before retrying. POSTFACT returns DONE only with affirmative completion evidence, NOT_DONE only with affirmative non-execution evidence, otherwise UNKNOWN. UNKNOWN is the safe default.

Browse

• GitHub tools
• GitHub and code hosting

Related MCP servers

• MCP Operation Risk
  Operation-level risk guidance for consolidated MCP tools, including schema drift and retry signals.
• DropEngine x402 Agent Services
  AI Agent Utility Layer for agent safety, web monitoring, crypto research and tool discovery.
• Deer Supply
  Deer Supply (Canada): GLP weight-loss pens, live prices and delivery; sign in for orders and health.
• Vibes-Coded Agent Security and Commerce Tools
  Agent supply-chain security, scanner consensus, x402 reliability, and commerce MCP tools.
• SCRIPTMASTERLABS — SqueezeOS MCP
  SqueezeOS MCP for live machine discovery and x402-paid USDC APIs on Base.
• RECOVER — Decide Safely After a Failed Machine Action
  Choose the safest next action after an API, MCP, or agent failure before retrying.
• TradeGauge
  Dynasty and redraft fantasy football trade values, trade grades, and Sleeper league rosters.
• Retry-outcome resolution dedup proxy
  Dedup proxy: claim-before-execute, UNKNOWN resolution, CONFLICT and ESCALATED refusal.

Badge for your README

[![AptLynx](https://aptlynx.net/badge/io.github.GSterlingPress/postfact.svg)](https://aptlynx.net/servers/io.github.GSterlingPress/postfact)

Listing text is written by the maker; AptLynx lists tools and does not vouch for them. Find another tool · Browse by topic · For agents