Evermint MCP

evermint-mcp

Tamper-evident receipts for AI agent actions. The notary layer for agent-to-agent transactions.

Install

npm install -g evermint-mcp

Claude Desktop config

Add to your claude_desktop_config.json:

{

"mcpServers": { "evermint": { "command": "evermint-mcp", "env": { "EVERMINT_API_KEY": "EVR-sk_your_key_here" } } } }

Get an API key at https://evermint.app/api-keys

1. Add to your Claude desktop config (~/.claude/claude_desktop_config.json):

{

"mcpServers": { "evermint": { "command": "npx", "args": ["-y", "evermint-mcp"], "env": { "EVERMINT_API_KEY": "EVR-sk_your_key_here" } } } }

1. Restart Claude. The tools appear automatically.

Tools

evermint_mint (API key required)

Mint a tamper-evident, cryptographically timestamped record of an action.

evermint_mint({

agent_id: "billing-agent-1", action_type: "decision_made", payload: { decision: "approved", confidence: 0.97 } })

evermint_verify (public)

Verify a single record by Record ID.

evermint_verify({ record_id: "EVR-12C5N1A2" })

evermint_list_records (API key required)

List records for the authenticated org with optional filters. Returns metadata only (no payloads).

evermint_list_records({

agent_id: "billing-agent-1", action_type: "decision_made", since: "2026-01-01T00:00:00Z", until: "2026-05-01T00:00:00Z", limit: 50 })

All filters are optional. limit defaults to 50 (max 200).

evermint_get_record (API key required)

Fetch the full contents of a single record, including its original payload. Returns 403 if the record exists but belongs to a different organization.

evermint_get_record({ record_id: "EVR-12C5N1A2" })

evermint_verify_chain (public)

Verify a sequence of hash-chained records. Confirms each hash matches its content, and each chain_link correctly references the prior record.

// Explicit list, oldest first

evermint_verify_chain({ record_ids: ["EVR-AAAAAAAA", "EVR-BBBBBBBB", "EVR-CCCCCCCC"] })

// Or walk forward from a starting point evermint_verify_chain({ start_record_id: "EVR-AAAAAAAA", length: 10 })

Returns per-record hash_valid, chain_link_valid, plus an overall chain_intact: true|false.

Verify any record

evermint.app/verify?id=EVR-XXXXXXXX

Publishing

To publish to npm as evermint-mcp:

• package.json name: "evermint-mcp"
• bin entry: { "evermint-mcp": "./dist/server.js" }
• Add to Anthropic MCP registry at modelcontextprotocol.io/registry

Contact

info@evermint.app