zambo-sdk

AER-1, the agent execution receipt standard: zambo.dev/aer-1 | Add Zambo to your AI: zambo.dev/add

Thin Python client for Zambo, the verifiable work layer for AI. 153 tools behind one MCP endpoint, a verifiable AER-1 receipt for every call. Free tier included: 20 free calls per day. No account, no API key. Zero dependencies.

Install

pip install zambo-sdk

Quickstart

from zambo_sdk import Client, verify_receipt

z = Client()

# 1. Call a tool: plain JSON-RPC, no API key
result = z.call("live_price", {"symbol": "BTC"})
print(result.text)
print("receipt:", result.receipt_id)
print("audit:  ", result.audit_url)

# 2. Route any goal through the universal entry point
job = z.universal("audit https://example.com for AI discoverability", session="demo-1")
print(job.text)

# 3. Search the full 153-tool catalog
found = z.search("generate QR code")
print(found.text)

# 4. Verify a receipt client-side (recomputes the sha256 locally)
v = verify_receipt(result.receipt_id)
print("verified:", v.verified, v.checks)

API

• Client().call(tool, arguments) -> CallResult (.text, .receipt_id, .audit_url, .receipt)
• Client().list_tools() -> list of tool descriptors
• Client().search(query) -> search the full catalog via capability_search
• Client().universal(goal, session=None) -> multi-step jobs via zambo_universal
• get_receipt(receipt_id) -> full receipt JSON
• verify_receipt(receipt_id) -> Verification (.verified, .checks, .audit_url)

verify_receipt checks three things: the receipt exists, the server marks it verified, and, recomputed locally so the server can't fake it, sha256(canonical_bytes) == output_hash, plus the presence of the anchor record. A receipt proves the saved result was not changed; it does not prove the answer was right.

Receipts follow AER-1 (IETF Internet-Draft draft-zambo-aer1-26). Multi-step jobs can be packaged as a handover: one link a reviewer opens to walk the steps and record a decision.

Notes

• Endpoint: https://zambo.dev/mcp (JSON-RPC 2.0 over HTTPS, streamable_http-compatible).
• Receipts: audit page https://zambo.dev/run/<uuid>; verify any receipt at https://zambo.dev/verify/.
• Need more than the free tier? The $0.99/24h Day Pass is at zambo.dev/day-pass.