Agent Credit Lines

What it is

Specification headings

1. Interface
2. Identities and controllers
3. Credit and quotes
4. Borrowing
5. Repaying
6. Defaults
7. Loan records

The abstract and headings above are the text at b6f453d, CC0. Read the full text at that commit.

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-8460

lab_erc(8460)

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(8460, "claimed", { agent_id })

Whether an identity has claimed its lab lines.

lab_read(8460, "line", { agent_id, line, contract })

An identity's line.

lab_read(8460, "quote", { agent_id, amount, term, line, contract })

The fee for a loan.

lab_read(8460, "loan", { loan_id, line, contract })

A loan.

lab_read(8460, "is_controller", { agent_id, account, line, contract })

Whether an address may borrow for an identity.

lab_read(8460, "terms", { line, contract })

The line's terms.

lab_prepare(8460, "claim_line", { agent_id })

Claim the identity's self-serve lines (normal and fast). Who signs: the identity's owner

lab_prepare(8460, "approve_repay", { amount, line, contract })

Let the line take the repayment. Who signs: the payer

lab_prepare(8460, "borrow", { agent_id, amount, term, to, max_fee, line, contract })

Borrow. Who signs: the identity's owner or its delegate

lab_prepare(8460, "repay", { loan_id, max_due, line, contract })

Repay a loan. Who signs: anyone

lab_prepare(8460, "mark_default", { loan_id, line, contract })

Mark a loan defaulted. Who signs: anyone, once its due date plus grace has passed

lab_prepare(8460, "set_delegate", { agent_id, delegate, line, contract })

Name a delegate who may borrow for the identity. Who signs: the identity's owner

lab_prepare(8460, "set_line", { agent_id, limit, fee_bps, contract })

Set an identity's line (your own line, as its admin). Who signs: your line's admin

lab_prepare(8460, "fund_line", { amount, contract })

Fund your own line with test dollars. Who signs: the lender

lab_deploy_prepare(8460, "credit_line", { admin, grace, max_term, asset, registry })

Your own SimpleCreditLine: you are its lender (admin).

lab_check_contract(8460, chain, address)

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

lab_feedback_draft(8460, note, txHash?)

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

HTTP

• GET https://lab.priors.trade/api/lab/erc/8460
• GET https://lab.priors.trade/api/lab/read/8460/claimed?agent_id=<agent_id>
• GET https://lab.priors.trade/api/lab/read/8460/line?agent_id=<agent_id>&line=<line>&contract=<contract>
• GET https://lab.priors.trade/api/lab/read/8460/quote?agent_id=<agent_id>&amount=<amount>&term=<term>&line=<line>&contract=<contract>
• GET https://lab.priors.trade/api/lab/read/8460/loan?loan_id=<loan_id>&line=<line>&contract=<contract>
• GET https://lab.priors.trade/api/lab/read/8460/is_controller?agent_id=<agent_id>&account=<account>&line=<line>&contract=<contract>
• GET https://lab.priors.trade/api/lab/read/8460/terms?line=<line>&contract=<contract>
• GET https://lab.priors.trade/api/lab/prepare/8460/claim_line?agent_id=<agent_id>
• GET https://lab.priors.trade/api/lab/prepare/8460/approve_repay?amount=<amount>&line=<line>&contract=<contract>
• GET https://lab.priors.trade/api/lab/prepare/8460/borrow?agent_id=<agent_id>&amount=<amount>&term=<term>&to=<to>&max_fee=<max_fee>&line=<line>&contract=<contract>
• GET https://lab.priors.trade/api/lab/prepare/8460/repay?loan_id=<loan_id>&max_due=<max_due>&line=<line>&contract=<contract>
• GET https://lab.priors.trade/api/lab/prepare/8460/mark_default?loan_id=<loan_id>&line=<line>&contract=<contract>
• GET https://lab.priors.trade/api/lab/prepare/8460/set_delegate?agent_id=<agent_id>&delegate=<delegate>&line=<line>&contract=<contract>
• GET https://lab.priors.trade/api/lab/prepare/8460/set_line?agent_id=<agent_id>&limit=<limit>&fee_bps=<fee_bps>&contract=<contract>
• GET https://lab.priors.trade/api/lab/prepare/8460/fund_line?amount=<amount>&contract=<contract>
• GET https://lab.priors.trade/api/lab/deploy/8460/credit_line?admin=<admin>&grace=<grace>&max_term=<max_term>&asset=<asset>&registry=<registry>
• GET https://lab.priors.trade/api/lab/check/8460/<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/8460.md. Try ERC-8460, Agent Credit Lines (a draft under review). Start with lab_setup for my testnet address to see my test ETH, test dollars and identities, then claim the identity's self-serve lines (normal and fast), then let the line take the repayment, then borrow, then repay a loan, then mark a loan defaulted, then name a delegate who may borrow for the identity with lab_prepare(8460, <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 IAgentCreditLine 0x34fe3856 (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-8460 (Agent Credit Lines), tried on the Priors lab.
Chain: Robinhood Chain testnet (46630).
Reference: https://github.com/priors-agents/erc-agent-credit-lines at 40a0d5661d9bf8d009d0f1426a55af2893cd56ba.
Draft text: pull request #2104 at b6f453da23bf7327a09b1907edb27b189f12673b.
Contract: 0x370fAf15c0D3F877eBfFb6A5377C350AEb291B02.