Etch MCP Server

etch-mcp

Etch is a signed audit chain for AI agent decisions, offline-verifiable against pinned public keys.

This repository is the MCP integration surface for Etch, the hosted service. It carries only:

• The MCP registry metadata (server.json, glama.json)
• Per-client integration examples for Claude Code / Cursor / Continue / Cline / Codex
• Documentation for attaching an MCP-compliant client to Etch

The hosted Etch service source is proprietary and lives in a separate repository. Nothing in this repository is required to be inspected or modified in order to use Etch.

Try in 30 seconds, no signup

curl -X POST https://etch.systems/v1/anonymous-projects

The response returns a bearer token, an MCP endpoint URL, and an anonymous project id. Point any MCP-compliant client at https://etch.systems/mcp with the token. Anonymous projects carry 500 signed events over 14 days; convert to a persistent project any time to keep the chain forever.

Full walk-through: etch.systems/docs/quickstart.

Per-client config

Claude Code

~/.claude/settings.json:

{
  "mcpServers": {
    "etch": {
      "url": "https://etch.systems/mcp",
      "headers": {
        "Authorization": "Bearer wm_YOUR_ANON_TOKEN"
      }
    }
  }
}

Cursor

~/.cursor/mcp.json (or .cursor/mcp.json at the project root):

{
  "mcpServers": {
    "etch": {
      "url": "https://etch.systems/mcp",
      "headers": {
        "Authorization": "Bearer wm_YOUR_ANON_TOKEN"
      }
    }
  }
}

Continue

~/.continue/config.yaml:

mcpServers:
  - name: etch
    url: https://etch.systems/mcp
    headers:
      Authorization: Bearer wm_YOUR_ANON_TOKEN

Cline (VS Code)

~/.config/Cline/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json:

{
  "mcpServers": {
    "etch": {
      "url": "https://etch.systems/mcp",
      "headers": {
        "Authorization": "Bearer wm_YOUR_ANON_TOKEN"
      }
    }
  }
}

Codex CLI

~/.codex/config.toml:

[mcp_servers.etch]
url = "https://etch.systems/mcp"
headers = { Authorization = "Bearer wm_YOUR_ANON_TOKEN" }

Per-client documentation with current config file locations is kept up-to-date at etch.systems/docs/mcp-clients.

Verify

Every event Etch signs is verifiable offline against pinned public keys with the OSS reference verifier. Auditors pin fingerprints once at pilot onboarding; every past epoch is verifiable indefinitely without contacting Etch.

• Reference verifier posture and benchmark numbers: etch.systems
• Framework mapping (SR 11-7, EU AI Act Article 12, ISO 42001, NIST AI RMF): etch.systems/aarm
• FAQ: etch.systems/docs/faq

What Etch is NOT

• Not a media-provenance envelope (that lane is C2PA and SPIF). Etch signs decisions, not content. Comparison: etch.systems/vs/c2pa.
• Not a transparency log (that lane is Sigstore Rekor). Etch is a per-project chain that anchors epochs on Rekor. Comparison: etch.systems/vs/sigstore-rekor.
• Not a watermarking system. Etch records who reviewed an output and what they applied, not whether a specific model touched the text.

License

The metadata and documentation in this repository are MIT-licensed (see LICENSE). The hosted Etch service is Business Source License 1.1 with a hosted-service restriction; see etch.systems/pricing for terms.

Registry listings

Etch is listed on:

• Official MCP Registry as io.github.SaravananJaichandar/etch
• Glama.ai MCP servers (auto-indexed from glama.json in this repo)
• Submissions pending on mcp.so, Smithery, PulseMCP

For issues with the hosted service, contact via etch.systems. For issues with the metadata or integration examples in this repository, open a GitHub issue here.