Fallback
Tiny paid recovery and decision utilities for autonomous agents.
| Endpoint | https://fallback.factrail.online/mcp (streamable-http) |
|---|---|
| Registry version | 0.1.0-beta.1 |
| Now | 4 tools · grade A (90) · pin ts_35554b61492f57a2dd3dead6055c2cef · protocol 2025-06-18 |
| First / last listed | 2026-10-26 08:09 UTC / 2026-10-26 08:09 UTC |
| Grade over time | 2026-10-26: A (90), 4 tools |
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Tools: source_route error_route request_repair stop_search
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 vi params: goal*, domain, start_url, preferred_formats, require_official, max_candidates |
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. params: goal, request, response, error, attempt |
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. params: goal, request*, response, error, error_route, schema, constraints |
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. params: goal, checks, remaining_routes, search_budget, risk |
Entries describe changes in tool definitions. They are not statements about a server, its quality or its author. The grade measures how the tool definitions fit model providers (token cost, schema compatibility, confusable names) as scored by the ToolFit engine at the time of the listing. JSON: append .json. Opt-out: how or hello@youraitools.co.