Fallback MCP Server

by baronsigma Your server? Claim it

answering

Fallback is answering right now. Last checked 12 min ago. It exposes 4 tools. Last commit 6 Oct 2026.

Tiny paid recovery and decision utilities for autonomous agents.

Uptime history 6 days of history · worst day 98%

6 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

175 ms

Response time

average over 24h

Stars

last commit 6 Oct 2026

Fallback missed 2 checks this week

Everything else answered, so this is steady rather than shaky. We check every 15 minutes, which is how a one-off gets told apart from the start of a pattern, and how you hear about the next one within the hour instead of from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 12 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add fallback-agent-tools --transport http https://fallback.factrail.online/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "fallback-agent-tools": {
      "url": "https://fallback.factrail.online/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.fallback-agent-tools]
url = "https://fallback.factrail.online/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "fallback-agent-tools": {
      "url": "https://fallback.factrail.online/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "fallback-agent-tools": {
      "url": "https://fallback.factrail.online/mcp"
    }
  }
}

Available tools 4

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

error

error_route

Diagnose a failed API, HTTP, MCP, or tool request and return a bounded safe next action. Use it after a request fails when the safe next step is unclear. Provide a status, response, or error text; it does not execute requests or verify undocumented fixes. Price: $0.002 USD per call via x402.

request

request_repair

Repair a failed API or HTTP request using only supplied schema and error evidence. Use after error_route identifies a request-shape or input problem. Returns the smallest justified request changes and abstains when evidence is insufficient. Price: $0.005 USD per call via x402.

source

source_route

Find likely authoritative or machine-readable sources when you know what information you need but not where to retrieve it. Provide a goal and optional publisher domain or start URL; it returns ranked candidate routes and bounded evidence. Use it before blind searching. Do not use it when you already have the correct source or only need reasoning over supplied context. Price: $0.02 USD per call via x402.

stop

stop_search

Decide whether another search or paid retrieval is worth the cost based on the scope already checked. Use after several search or source checks when you need to decide whether to continue or return a scoped not-found result. It does not prove universal absence and performs no searches itself. Price: $0.003 USD per call via x402.

Endpoints

URL	Transport	State	Latency	Checked
https://fallback.factrail.online/mcp	streamable-http	answering	175 ms	12 min ago

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