Every change Wellknown observed on this MCP server, newest first, with what it was before and what it became. Tool-surface changes carry the definition diff. Nothing here is edited after the fact.
Live → Recently observed
Certificate recorded, valid to 2026-12-17
Authorization not required
Certificate changed, valid to 2026-12-20
First tool surface recorded: 6 tools (server version 3.4.7)
https://api.collarguardrail.com/mcp-http/mcp (mcp_streamable_http) — from mcp_registry
Added "evaluate_trade_paid"; changed the definition of "evaluate_trade" (5 tools before, 6 now)
Evaluate Trade (Free)⟨25 unchanged words⟩ fixed Tier 1 ceiling ($5,000 notional)— MCP.callersFordohighernot get COLR tierlimits,gating.useFor`evaluate_trade_paid`
Certificate recorded, valid to 2026-10-22
Authorization not required
Unknown → Live
First tool surface recorded: 5 tools (server version 3.4.7)
https://backendai-x4m1.onrender.com/mcp-http/mcp (mcp_streamable_http) — from mcp_registry, with the record
Showing the latest 12 events. The API returns up to 500 and filters by kind: ?kind=tool_surface_changed
⟨5 unchanged words⟩ false,"readOnlyHint":true,"title":"Evaluate Trade (Free)"}
Evaluate Trade (x402 Paid, Tier 2) — Pre-trade risk check gated by an x402 payment. Evaluated as COLR Tier 2: $25,000 notional ceiling, 10/25 per-minute rate limits. No COLR holdings are required — the on-chain payment is the credential. FLOW ---- 1. Call WITHOUT payment_proof → the tool returns a `PaymentRequiredOutput` describing the on-chain payment (network, asset, amount, payTo, resource). 2. Settle the payment on-chain using an x402-capable client. The facilitator returns a proof string. 3. Call again with `payment_proof=<proof>` → the tool forwards the proof to the guardrail's x402-paid endpoint and returns a…