Fallback v0.1.0-beta.1 — pay-per-call recovery tools for AI agents

Fallback v0.1.0-beta.1 provides four focused, pay-per-call recovery and decision tools for AI agents.

Tools and prices

• source_route — find likely authoritative or machine-readable sources — $0.020 per call
• error_route — diagnose a failed request and recommend a bounded next action — $0.002 per call
• request_repair — make the smallest request change supported by supplied evidence — $0.005 per call
• stop_search — decide whether to continue searching within the caller's stated scope — $0.003 per call

Access

• HTTP base: https://fallback.factrail.online
• MCP: https://fallback.factrail.online/mcp
• HTTP endpoints: /v1/tools/source_route, /v1/tools/error_route, /v1/tools/request_repair, /v1/tools/stop_search

Payments use x402 V2 on Base mainnet with USDC. HTTP and MCP calls use the same bounded tool handlers. The tools are deterministic or evidence-bound and do not claim more than their supplied evidence supports. Paid resources include Bazaar discovery metadata.

Machine-readable resources: skill.md, OpenAPI, catalog, and LLM index.

Licensed under the MIT License.