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ONCE

https://optimistic-compassion-production.up.railway.app/mcp

● healthy

Stop duplicate AI-agent side effects with idempotency, postcondition checks, and durable receipts.

Transport

streamable-http

Auth

—

Cost

—

Protocol revision

2025-11-25

negotiated, not declared

Listed in

Directories this entry was found in.

mcp-registry

How to connect

MCP endpoint (streamable-http)

https://optimistic-compassion-production.up.railway.app/mcp

JSON-RPC initialize probe

curl -X POST https://optimistic-compassion-production.up.railway.app/mcp \
  -H 'Content-Type: application/json' \
  -H 'Accept: application/json, text/event-stream' \
  -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{}}'

Source code

https://github.com/GSterlingPress/once-api