Agent Default Registry

What it is

Specification headings

1. Interface
2. Primaries
3. Records
4. Counting
5. Listing

The abstract and headings above are the text at 7bf377e, CC0. Read the full text at that commit.

Nothing at Priors runs this draft. Its reference contracts go on the testnet only.

Try it

On Robinhood Chain testnet (46630), with the reference contracts at their pinned commits and test tokens of no value. Each action shows the call it prepares before your wallet signs it, and each send is simulated first.

The testnet contracts

Actions

Reads

Deploy your own

Deploy the reference contract from its pinned commit with your own wallet, on the testnet: you become its lender, launchpad or backer. Its address shows once the receipt is in, and Check a contract below reads it.

With an agent

Your agent gets the same lab through the MCP server at https://lab.priors.trade/mcp or the HTTP API described by /openapi.json. It reads, and gets back unsigned testnet transactions to sign with its own testnet key. The lab holds no key of its own for you and never asks for one.

MCP tools for ERC-8461

lab_erc(8461)

What the draft does on the lab, its contracts and an agent's next calls.

lab_setup(address)

Test ETH, test dollars and the testnet identities of an address, with the calls to register one and mint test dollars.

lab_read(8461, "agent_defaults", { agent_id, trusted, contract })

An identity's defaults, counted against trusted primaries.

lab_read(8461, "owner_defaults", { owner, trusted, contract })

An owner's defaults, counted against trusted primaries.

lab_read(8461, "reported", { loan_id, line })

Whether a lab loan's default was recorded, and its record.

lab_read(8461, "records_of_agent", { agent_id, start, limit, contract })

An identity's records.

lab_read(8461, "record", { record_id, contract })

One record.

lab_read(8461, "primary_of", { reporter, contract })

A reporter's primary.

lab_prepare(8461, "report_default", { loan_id, line })

Report a lab loan past due plus grace (marked defaulted and recorded by the lab's reporter). Who signs: anyone, once the loan is past due plus grace

lab_prepare(8461, "record_default", { agent_id, owner, asset, principal, loan_ref, contract })

Record a default (as a reporter). Who signs: a lender's reporter

lab_prepare(8461, "record_cure", { record_id, recovered, contract })

Record a cure. Who signs: the record's reporter

lab_prepare(8461, "void_record", { record_id, contract })

Void a record within the void window. Who signs: the record's reporter or its primary

lab_prepare(8461, "set_primary", { primary, contract })

Propose a primary (as a reporter). Who signs: a reporter

lab_prepare(8461, "accept_primary", { reporter, contract })

Accept a reporter (as its primary). Who signs: the proposed primary

lab_prepare(8461, "drop_reporter", { reporter, contract })

Drop a reporter (as its primary). Who signs: the reporter's primary

lab_deploy_prepare(8461, "registry", { identity_registry })

Your own AgentDefaultRegistry.

lab_check_contract(8461, chain, address)

The conformance read of any contract, on testnet or mainnet: supportsInterface and the views.

lab_feedback_draft(8461, note, txHash?)

The report text and the thread and issue links. It posts nothing.

HTTP

• GET https://lab.priors.trade/api/lab/erc/8461
• GET https://lab.priors.trade/api/lab/read/8461/agent_defaults?agent_id=<agent_id>&trusted=<trusted>&contract=<contract>
• GET https://lab.priors.trade/api/lab/read/8461/owner_defaults?owner=<owner>&trusted=<trusted>&contract=<contract>
• GET https://lab.priors.trade/api/lab/read/8461/reported?loan_id=<loan_id>&line=<line>
• GET https://lab.priors.trade/api/lab/read/8461/records_of_agent?agent_id=<agent_id>&start=<start>&limit=<limit>&contract=<contract>
• GET https://lab.priors.trade/api/lab/read/8461/record?record_id=<record_id>&contract=<contract>
• GET https://lab.priors.trade/api/lab/read/8461/primary_of?reporter=<reporter>&contract=<contract>
• GET https://lab.priors.trade/api/lab/prepare/8461/report_default?loan_id=<loan_id>&line=<line>
• GET https://lab.priors.trade/api/lab/prepare/8461/record_default?agent_id=<agent_id>&owner=<owner>&asset=<asset>&principal=<principal>&loan_ref=<loan_ref>&contract=<contract>
• GET https://lab.priors.trade/api/lab/prepare/8461/record_cure?record_id=<record_id>&recovered=<recovered>&contract=<contract>
• GET https://lab.priors.trade/api/lab/prepare/8461/void_record?record_id=<record_id>&contract=<contract>
• GET https://lab.priors.trade/api/lab/prepare/8461/set_primary?primary=<primary>&contract=<contract>
• GET https://lab.priors.trade/api/lab/prepare/8461/accept_primary?reporter=<reporter>&contract=<contract>
• GET https://lab.priors.trade/api/lab/prepare/8461/drop_reporter?reporter=<reporter>&contract=<contract>
• GET https://lab.priors.trade/api/lab/deploy/8461/registry?identity_registry=<identity_registry>
• GET https://lab.priors.trade/api/lab/check/8461/<chain>/<address>
• GET https://lab.priors.trade/api/lab/setup/<address>

Connect it, for example in Claude Code: claude mcp add --transport http priors-lab https://lab.priors.trade/mcp

A prompt to copy

Use the Priors lab on Robinhood Chain testnet (chain id 46630), where every token is a test token of no value. Its MCP server is https://lab.priors.trade/mcp and this draft's page is https://lab.priors.trade/erc/8461.md. Try ERC-8461, Agent Default Registry (a draft under review). Start with lab_setup for my testnet address to see my test ETH, test dollars and identities, then report a lab loan past due plus grace (marked defaulted and recorded by the lab's reporter), then record a default (as a reporter), then record a cure, then void a record within the void window, then propose a primary (as a reporter), then accept a reporter (as its primary) with lab_prepare(8461, <action>, params). Each prepare returns an unsigned transaction { chainId: 46630, to, data, value }: sign and send it yourself with a testnet key, and refuse any other chain. Never ask me for a key. After each transaction, read the result back with lab_read and tell me what changed. If the draft or its reference code looks wrong, draft a report with lab_feedback_draft.

Check a contract

Paste any contract on either chain: the lab reads supportsInterface for IAgentDefaultRegistry 0x95030b12 (computed from the pinned interface) and ERC-165's own, then calls each view. It only reads, so another implementer can test conformance with nothing signed.

Feedback

What you found goes where the draft is worked on: the discussion of the text in its thread on Ethereum Magicians, a bug in the reference code in its repository's issues. You post it under your own account. The lab posts nothing for anyone.

ERC-8461 (Agent Default Registry), tried on the Priors lab.
Chain: Robinhood Chain testnet (46630).
Reference: https://github.com/priors-agents/erc-agent-default-registry at eb26be80a4aed99f440f92c5ca59c6c6641d44ff.
Draft text: pull request #2105 at 7bf377e5fb727a61bedfeea1d9dd640b2c2c8124.
Contract: 0x8845f144F5dEFef80fc2C1d0be3A48a11DEceDE9.