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100
MCP live MCP 2025-06-18 streamable-http

Assay: settlement verification

io.fomox/assay

Verify crypto payments really settled and how much arrived. 20 chains. Read only, no API key.

Watch this dependency Share evidence report
Uptime
100.0%
5 direct probes · 30d
Response
1217ms
last probe
Tools
6
callable
Resources
0
readable
Prompts
0
available
Primary URL
https://fomox.io/api/assay/mcp
Score: 100/100
Handshake verified by our own probe.
pass Answers the MCP handshake 50/50
The handshake and the list calls succeeded on the primary URL.
pass Lists tools, resources or prompts 30/30
6 tools, 0 resources, 0 prompts returned.
pass 3 or more catalogue items 10/10
6 items in total; 3 or more earns these points.
pass Describes itself 10/10
93 characters; more than 30 earns these points.

Tools · 6

verify_payment

Check whether a crypto payment really settled and how much was ACTUALLY delivered, which is often not the amount the transaction claims. Use this before crediting anyone for an incoming payment. Retu…

list_chains

List every chain this service can verify, with the confirmation depth each needs before a payment is treated as final, and how deeply it can be verified. Call this if you are unsure whether a chain is…

list_failure_modes

List every known way a blockchain payment can appear successful while being worth less than it claims, or nothing at all. Each entry explains what the chain does, what it costs you when you get it wro…

evaluate_spend_policy

Check a proposed payment against spending limits that live OUTSIDE your context, where no instruction in a prompt, a message or a web page can change them. Returns a signed allow or deny with reasons.…

run_sandbox_case

Practise on a payment designed to deceive you, with no money at risk. Returns a verification result shaped exactly like a real one for one of 19 adversarial cases. Decide whether you would credit it, …

check_sandbox_answer

Score your decision on a sandbox case. Tell it whether you would have credited the payment and for how much, and it replies with whether that was correct and, if not, exactly what the error would have…

How to use

Claude Desktop or claude.ai: add a custom connector (Customize → Connectors; on Team and Enterprise plans an owner adds it under Organization settings → Connectors) with this server URL: https://fomox.io/api/assay/mcp

Cursor or Cline: add to your MCP config:

{
  "mcpServers": {
    "assay:_settlement_verification": {
      "url": "https://fomox.io/api/assay/mcp",
      "transport": "streamable-http"
    }
  }
}