── Integration Guide ──

Verdict for Claude.
Install in 60 seconds.

Verdict speaks JSON-RPC 2.0 / MCP protocol 2025-06-18. The remote endpoint is live today — no install required. Every sealed record carries a Sigstore Rekor transparency-log anchor, publicly verifiable.

1. Claude Code (CLI)

claude mcp add verdict --transport http --url https://verdict.systems/api/mcp

One command. Adds Verdict to your active Claude Code MCP servers. No keys, no auth, no install — the remote endpoint is public and rate-limited per IP.

2. Claude Cowork / claude.ai

Settings → Connectors → Add custom → paste the endpoint URL:

https://verdict.systems/api/mcp

3. Claude for Legal plugins

Add Verdict to a plugin's .mcp.json:

{
  "mcpServers": {
    "Verdict": {
      "type": "http",
      "url": "https://verdict.systems/api/mcp",
      "title": "Verdict",
      "description": "Seals Claude legal AI outputs into court-preparable Sealed Evidence Records — payload hash, Merkle root, chain of custody, attorney review state, and FRE 902(14) custodian packet drafts."
    }
  }
}

The upstream PR adding this entry to commercial-legal, corporate-legal, litigation-legal, ai-governance-legal, ip-legal, and regulatory-legal plugins is at anthropics/claude-for-legal#20.

Tool reference

verdict_create_evidence_record

Seal a Claude legal-workflow output into a Sealed Evidence Record (SER). Each call binds a server-attested received_at into the canonical hash and anchors the resulting Merkle root to the Sigstore Rekor public transparency log.

verdict_score_evidence_readiness

Score whether a record has enough provenance metadata to survive audit, discovery, outside-counsel-guideline review, or FRE 902(14)-style authentication. Returns a 0-100 score plus a remediation checklist.

verdict_export_fre902_certificate

Draft a custodian certification packet from a sealed record. Output is a preparation aid for counsel; a qualified custodian must still sign before service or filing.

Example: seal a Claude output

curl -sX POST https://verdict.systems/api/mcp \
  -H "content-type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/call",
    "params": {
      "name": "verdict_create_evidence_record",
      "arguments": {
        "matter_id": "M-100",
        "workflow": "brief_drafting",
        "input_summary": "Draft motion from approved authority packet.",
        "output_summary": "Generated argument outline with cited authorities.",
        "human_review_status": "pending",
        "model_provider": "Anthropic",
        "model": "claude-opus-4-5"
      }
    }
  }'

The response includes a chain_of_custody.transparency_anchor with a rekor_url. Open the URL to verify the Sigstore Rekor entry on the public transparency log.

Limits & troubleshooting

◈Rate limit: 300 requests / minute / IP. Exceeding returns HTTP 429 with a retry-after header.
◈Payload cap: 256 KB per request. Larger payloads return HTTP 413.
◈Batch cap: 10 JSON-RPC requests per batch. Larger batches return HTTP 400.
◈Sigstore Rekor unreachable: the tool returns a deferred transparency_anchor with a reason field. The record itself is still cryptographically sealed; only the public-log anchoring is deferred.

Licensing terms.

Verdict commits to a published RAND-Z licensing posture for the Sealed Evidence Record specification, scoped to conformant implementations and subject to defensive-termination terms. Full IP Policy is in counsel review and publishes within 14 days.

Read the IP Policy →

Verdict for Claude.Install in 60 seconds.