manifest-sdk 0.2.4

Cryptographic receipts for AI agent tool calls

manifest-sdk

Cryptographic receipts for AI agent tool calls — Python SDK.

Pure Python implementation of the manifest receipt format. Generates receipts that are byte-for-byte verifiable by the Rust CLI.

Install

pip install manifest-sdk

Quick Start

from manifest_sdk import Manifest

m = Manifest(identity="my-agent", db="receipts.db")

receipt = m.record(
    tool="send_email",
    input={"to": "[e-mail]", "subject": "Hello"},
    output={"status": "sent"}
)

print(receipt.id)                    # urn:uuid:...
print(receipt.proof.signature)       # ed25519:...
print(receipt.content_hash())        # sha256:...

Features

• Ed25519 signing — Key generation, signing, verification (32-byte seed files)
• Merkle tree — Append-only tree matching the Rust implementation
• Policy evaluation — Tool allowlists, spending limits, PII detection
• SQLite storage — Same schema as the Rust CLI (cross-readable)
• Receipt chaining — Each receipt links to the previous via content hash
• JSON-LD receipts — Same format as the MCP proxy

Advanced Usage

from manifest_sdk import (
    AgentIdentity, IdentitySource, Action, Delta,
    ReceiptBuilder, Signer, MerkleTree, Storage, PolicyConfig,
)

# Manual control over each component
signer = Signer.generate()
merkle = MerkleTree()
storage = Storage.open("receipts.db")

identity = AgentIdentity(
    name="procurement-bot",
    deployer="acme-corp",
    environment="production",
    source=IdentitySource.CONFIG,
)

receipt = (
    ReceiptBuilder()
    .agent(identity)
    .action(Action(tool="db_query", input={"sql": "SELECT 1"}, output={"rows": 1}))
    .delta(Delta(authorized=True))
    .build(signer, merkle)
)

storage.insert_receipt(receipt, session_id="session-1")

# Verify the signature
canonical = receipt.canonical_bytes()
assert signer.verify(canonical, receipt.proof.signature)

License

Apache 2.0