MCP server

Canonicalhash

io.github.Mlartab2/canonicalhash

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Deterministic JSON hashing and EIP-712 attestations for AI agents via x402.

Working at last checkAbout 547 tokens per request once connected5 tools

https://canonicalhash-production.up.railway.app/mcp

At a glance

Type: MCP server
Publisher: Not verified
Status: Working at last check
Tools: 5
Token cost: About 547 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 26 Oct 2026, 08:29 UTC

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http canonicalhash https://canonicalhash-production.up.railway.app/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.canonicalhash]
url = "https://canonicalhash-production.up.railway.app/mcp"

Gemini CLI

{"mcpServers":{"canonicalhash":{"httpUrl":"https://canonicalhash-production.up.railway.app/mcp"}}}

Cursor

{"mcpServers":{"canonicalhash":{"url":"https://canonicalhash-production.up.railway.app/mcp"}}}

VS Code

{"servers":{"canonicalhash":{"type":"http","url":"https://canonicalhash-production.up.railway.app/mcp"}}}

Antigravity

agy mcp add canonicalhash https://canonicalhash-production.up.railway.app/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"canonicalhash","server_url":"https://canonicalhash-production.up.railway.app/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"canonicalhash","server_url":"https://canonicalhash-production.up.railway.app/mcp"}

batch_canonicalize ~97 tokens
Batch canonicalize up to 1000 JSON payloads in one call.
canonicalize ~124 tokens
Canonicalize JSON with RFC 8785 and return a SHA-256 hash plus an EIP-712 signed attestation.
create_receipt ~111 tokens
Generate a tamper-evident EIP-712 action receipt for an agent decision.
structure_extraction ~118 tokens
Extract structured JSON from messy text (emails, logs, tickets) using regex or Needle 3.
verify_attestation ~97 tokens
Verify an EIP-712 attestation against the published public key. Always free.

Agent Embassy
Agents pay for work and prove it. Verified checks $0.15, recovery $1.00. USDC on Base via x402.
corpusAI Cloud Pricing
Cloud, GPU and LLM token prices with index fixings. Pay per call over x402 or with a prepaid key.
AINumbers Fintech Intelligence Suite
754 MCP tools across 1220 fintech tools: ChainGraph AP2 decisions, execution_hash. Zero PII.
AgentBIT
x402 router-proxy + 79 keyless pay-per-call tools on Base. Pay once, we run the best tool.
Hermes Plant — Agent Commerce Assurance
Preflight, approve, and prove consequential agent actions with signed evidence and x402 tools.
StealthGuard 402
Stealth web extraction, Polymarket alpha, and on-chain pre-trade gating via x402 on Base.
GAIP Trust & Assurance Agent
Now part of GAIP Witness: verifies GAIP receipts; evidence packs and incident bundles.
AgentsToolsHub
156 paid-per-call JSON APIs for AI agents over x402: calculators, live data, crypto, security, dev.

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