MCP Server

Agent Receipts

com.dropwatchhq/agent-receipts
MCP & Agent Infrastructure Security Public & reachable MCP 2026-07-28

What this MCP does

Issues, lists, and verifies signed, hash-chained receipts documenting agent actions and their inputs and outputs.

issue_receipt
Mint a verifiable provenance receipt for an autonomous-agent action. Returns a signed (ed25519), content-hashed (SHA-256), server-timestamped receipt that is hash-chained to this agent's prior receipts (tamper-evident audit trail). Pass the raw inputs/outputs (we hash them — raw data is never stored) OR pre-computed sha256 hashes. Use for compliance, audit trails, and dispute resolution of agentic actions. PAID: $0.01 USDC/call via x402.
Input schema
{'type': 'object', 'required': ['action'], 'properties': {'action': {'type': 'string', 'description': "What the agent did, e.g. 'sent_payment' or 'approved_refund' or 'tool_call:search'."}, 'inputs': {'description': 'Raw inputs to the action (any JSON). Hashed to a commitment; raw data not stored.'}, 'outputs': {'description': 'Raw outputs/result of the action (any JSON). Hashed to a commitment; raw data not stored.'}, 'agent_id': {'type': 'string', 'description': 'Stable identifier for the acting agent (chains group by this).'}, 'metadata': {'type': 'object', 'description': 'Optional small key/value context (model, version, request id, etc.).'}, 'inputs_hash': {'type': 'string', 'description': "Alternatively, a pre-computed sha256 hex (or 'sha256:<hex>') of inputs."}, 'outputs_hash': {'type': 'string', 'description': "Alternatively, a pre-computed sha256 hex (or 'sha256:<hex>') of outputs."}}}
list_receipts
List the receipt hash-chain for an agent_id, newest first (id, action, timestamp, sequence, hashes, verifyUrl). Use to audit everything a given agent has attested. FREE.
Input schema
{'type': 'object', 'required': ['agent_id'], 'properties': {'limit': {'type': 'number', 'description': 'Max receipts (default 25, max 100).'}, 'agent_id': {'type': 'string', 'description': 'The agent whose receipts to list.'}}}
verify_receipt
Verify a receipt by id (or by passing the full receipt object). Recomputes the content hash, confirms the id commits to the body, and checks the ed25519 signature. Returns the verification checks plus the provenance record (action, agent, input/output hashes, timestamp, chain position). FREE.
Input schema
{'type': 'object', 'properties': {'id': {'type': 'string', 'description': "Receipt id, e.g. 'rcpt_...'."}, 'receipt': {'type': 'object', 'description': 'Alternatively, the full receipt object to verify offline-style.'}}}
Added
list_receipts
Sept. 17, 2026, 12:34 p.m.
Added
verify_receipt
Sept. 17, 2026, 12:34 p.m.
Added
issue_receipt
Sept. 17, 2026, 12:34 p.m.