OnChainDiligence — Agentverse Adapter

A thin distribution adapter making OnChainDiligence (OCD) reachable from Agentverse / ASI:One via the Agent Chat Protocol (ACP). It reimplements nothing: every reply is the unmodified result of one call to OCD's existing, public, no-auth MCP surface.

Agentverse / ASI:One
        ↓  Agent Chat Protocol
this adapter (FastAPI, stateless)
        ↓  plain HTTPS tools/call
https://mcp.onchaindiligence.com/public/mcp
        ↓
existing OCD backend (same policy / receipt / verification semantics)

Agent profile

• Name: OnChainDiligence

• Handle: @onchaindiligence

• Short description: Accountability and reconciliation for autonomous agent payments.

• About: OnChainDiligence compares what an agent was permitted to do with provider claims and independently observed evidence, then shows what matched, what disagreed and what remains unknown.

Related MCP server: vantic-mcp

Summary

OnChainDiligence (OCD) answers one question about an autonomous agent's payment: did it do what it was authorized to do — and can I prove it? It inspects a proposed payment against policy before execution, and independently verifies signed payment receipts against Base settlement after execution.

Key Features

• Inspect a proposed payment against a policy (max amount, allowed network/asset)

• Retrieve a public, signed OCD receipt by its exact ID

• Verify a receipt's cryptographic proof: VALID, INVALID, or UNVERIFIABLE

• Free, no account, no wallet connection required for any of the above

Usage

Ask things like:

Inspect a $0.001 USDC payment on Base against a $1 maximum.
Retrieve OCD receipt OCD-RCP-NB51-QG4S-VCAN-Y57F.
Verify that receipt and tell me what it does and doesn't prove.

Use Cases

• An agent developer sanity-checking a payment before it executes

• A support team investigating whether a past agent payment actually settled

• Anyone who received an OCD receipt and wants to independently confirm it

Limitations

• Read-only: this agent cannot send payments, custody funds, or authorize a wallet on your behalf

• Inspection is a deterministic policy comparison only — no sanctions screening, no signing

• VALID confirms cryptographic integrity/authenticity under the OCD verifier contract, not that the underlying action succeeded or was safe

• "Preflight" requests return a free, unsigned preview via inspect_payment only; a durable, signed PREFLIGHT receipt requires OCD's paid preflight_payment tool, which this adapter never calls on your behalf

Architecture / capabilities exposed

No new OCD endpoint exists or was added. No OCD API key is required or held by this adapter — it calls the same free, no-auth surface any external client (Claude, ChatGPT) already uses.

The intent router (app/intents.py) is deterministic keyword/regex matching — no LLM classifier. Missing required fields (amount, network, asset, recipient) are always asked for, never guessed. A request to actually send/sign/authorize a payment is always refused, routed to no tool — this adapter has no wallet and no payment capability of any kind.

Local development

python -m venv venv && source venv/bin/activate  # or venv\Scripts\activate on Windows
pip install -r requirements-dev.txt
uvicorn app.main:app --reload

GET /status and POST /chat are then available at http://127.0.0.1:8000.

Testing

pytest -m "not live"   # unit tests, no network
pytest -m live         # live, read-only calls against the real OCD endpoint

Identity

python scripts/generate_identity.py

Generates exactly one dedicated Agentverse identity for this adapter (a random seed → a uagents_core address). This is a new identity — never the Technocore DID, any OCD signing key, any wallet key, or any API credential. The seed is written to a local, gitignored .env and never logged or printed; only the resulting public agent1q... address is printed, which is safe to share (it's how other agents address this one).

Registration (operator step — not run by this repo's automation)

scripts/register_agentverse.py is ready to run once you have an Agentverse.ai account and API key:

export AGENTVERSE_AGENT_SEED=<from .env>
export AGENTVERSE_API_KEY=<your Agentverse API key>
export ADAPTER_PUBLIC_URL=https://<your-deployed-adapter>/chat
python scripts/register_agentverse.py

Known differences from the D2.10I research

The D2.10I spec (based on 2026-era blog/doc summaries) suggested a uAgents process could self-register to the testnet Almanac purely from a local seed, with no Agentverse account. Checked directly against the currently installed uagents-core==0.4.9 source (not just docs) before writing any registration code: register_chat_agent() — the current, official, chat-protocol-aware entry point — requires agentverse_api_key in every code path. There is no registration function in this library version that succeeds without one. Creating that account/API key is account creation, which is outside what this build session performs — it's the one required operator step before registration (testnet or mainnet) can happen at all.

Mainnet cost

Not established by this build — register_chat_agent()'s registration call itself is an Agentverse API call, not a specific on-chain FET spend visible from the library source. The wider Fetch.ai ecosystem documents a small, periodically-renewed (~48h) FET fee for Almanac registration generally; testnet is faucet-funded. Confirm the exact current mainnet fee/renewal amount in the Agentverse dashboard before registering on mainnet — do not assume a figure from older research.

Known unknowns

• Exact /chat wire semantics on Agentverse's real external-agent adapter path are not fully pinned down by current public docs. This implementation's best-effort reading: POST a ChatMessage, receive a reply ChatMessage as the HTTP response body. Verified correct against this adapter's own test suite and a real local HTTP round trip (see tests/test_chat_endpoint.py); not yet verified against a live Agentverse registration, since that requires the account above. Re-verify this once registered.

• Agentverse's exact avatar technical spec (size/format) is not published anywhere found during research — a square PNG reusing OCD's existing site seal/mark is the safe default.

Security

• No OCD credential of any kind is held by this adapter.

• No wallet key, no payment capability — PREFLIGHT_INFO deliberately never calls the paid preflight_payment tool.

• The only new secret this integration introduces is the Agentverse agent seed — store and treat it like any other provider secret in this project: never in source, never logged.

• Chat input is untrusted text routed through a fixed keyword matcher, not given to an LLM with tool-call autonomy over OCD.

• Receipt content and pasted envelopes are treated as untrusted data, not instructions — matching OCD's own MCP tool descriptions.