org.aspern/aspern

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Publisher-provided title

ASPERN: counterparty checks for agents

Publisher-provided description

What the chain records about an address before you pay it, and whether a payment fits it.

Summary by lookupd

Checks on-chain records for a counterparty address, endpoint, or vault before paying, connecting, or moving capital.

Install

Claude Code, remote (streamable-http)

claude mcp add --transport http aspern https://aspern.org/mcp

Codex, remote (streamable-http)

codex mcp add aspern --url https://aspern.org/mcp

Cursor, remote (streamable-http) → .cursor/mcp.json

{
  "mcpServers": {
    "aspern": {
      "url": "https://aspern.org/mcp"
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Tools (showing 30 of 52)

Publisher-provided text

• identify Call this FIRST whenever you hold something other than a wallet address. Give it a transaction hash, an http(s) URL, a hostname or an ERC-8004 registration numb
• check_service_endpoint Call this before connecting to a service. Give it the http(s) URL of an MCP or A2A endpoint and it says who declares it, whether our daily probe reached it, wha
• preflight_payment Call this immediately before sending a payment, every time — not once per counterparty. It weighs THIS payment (the amount, the chain, the endpoint) against wha
• vault_assessment THE HASH-COMMITTED ASSESSMENT OF A VAULT, in the shape ERC-8004’s Reputation Registry points at, and the only thing here a third party can publish on chain unde
• vault_exits SEND `exitAmountUsd` WITH THE POSITION YOU ARE WEIGHING and this answers whether that size has ever cleared here: the schema has carried it since 2026-10-08, an
• vault_risk_dimensions SIX RISKS, NOT ONE WORD, across every vault we score. A risk band is a weighted whole and a reader takes it as a summary of everything, which it is not: ours we
• portfolio_screen READ THE VAULTS YOU HOLD TOGETHER. This one is about a SET rather than a single subject; an allocator does not hold one subject. This answers the three question
• capital_coverage BEFORE YOU TRUST ANY COVERAGE FIGURE FROM US, ask this. It says how much of the market each vault reading actually covers, counted TWO WAYS: by number of open v
• exit_lifecycle_coverage HOW MUCH OF THE WAY OUT WE CAN SEE, phase by phase, across every open vault. Getting out has four phases — a request filed, something set aside to claim, money
• endpoint_coverage BEFORE YOU TREAT ANY ENDPOINT AS RELIABLE, ask how well we know. There is no uptime number here and there will not be one, because the states mean different thi
• payment_evidence BEFORE YOU QUOTE ANY FIGURE FOR AGENT COMMERCE, ask which of three it is. Every payment shown to be one, x402 and ACP, is split into three figures that NEST and
• evidence_for Everything we hold about one subject, as edges, each carrying where it came from. Use it when you need to explain a decision rather than just make one, or to se
• evaluate_action Call this when you are about to DO something and need one answer you can act on: pay an address, connect to an MCP server, call a tool, or put capital into a va
• evaluate_vault_decision Call this before an agent moves capital into or out of a vault, with the decision it is about to make: the vault, the amount, the MANDATE it must stay inside an
• simulate_withdrawal TRY ONE WITHDRAWAL FROM A VAULT BEFORE YOU MAKE IT. Runs the vault’s own withdraw(amount, holder, holder) by eth_call at the head block, as the holder you name
• test_purchase WALK THE WHOLE PURCHASE OF AN x402 ENDPOINT WITHOUT PAYING, in the order a buyer actually asks the questions, stopping at the first one that objects. All five a
• knock_on_endpoint KNOCK ON AN x402 ENDPOINT AND GET WHAT IT SERVED. `test_purchase` beside this walks a buy WITHOUT paying and stops at the quote; its own caveat has always said
• endpoint_disagreements WHICH ENDPOINTS CONTRADICT THEIR OWN LISTING: they ask to be paid at an address the catalogue entry they published does not name. The contradiction appears only
• list_x402_endpoints WHICH ENDPOINTS A PAYEE SELLS, or which ones match some text. The sharpest check a payment can get is the endpoint being bought, and until this a caller had to
• list_policies The policies evaluate_action can be run under, in full: every rule, its id and the sentence it checks. Published deliberately, including to the agents being eva
• counterparty_check Before paying or hiring an agent: what the chain records about that address. `byNetwork` splits it network by network: x402 payments received (and their dollars
• vault_sanctions_screening One vault against the OFAC SDN list: its contract roles and its direct holders where the holder list is complete, exact address matches only, with the list vers
• vault_due_diligence The due-diligence report on one vault, cut to what an agent acts on: overallAssessment (published, conditional or withheld; publishedBand is null when withheld
• vault_drift What changed on one vault, day by day, between the stored daily due-diligence reports: the overall assessment (including when it became withheld or published ag
• counterparty_evidence Before trading with an agent or service: what the records actually say about it, in one answer. Identity links with their strength (declared by the agent, obser
• vault_check Before putting capital into a vault: what the record shows about it. The headline is what a holder ACTUALLY EARNED set against the advertised rate, with the ris
• find_vaults Find a vault by what it has DONE rather than what it is called. Free. The filter worth knowing is `earned`: `short` returns the vaults where a holder earned LES
• operator_check The question that follows vault_check: who runs the money, and how much of it is their own. Free. Read `ownShare` with its limits, which travel inside it: the l
• list_vaults The vaults we read, so a caller holding a name rather than a slug can find the one it means. Free. Absence from this list means we do not read that vault, never
• find_agents Find agents to hire by what the chain records rather than what they claim: filter every address ever paid on x402, Virtuals ACP, the Olas mech marketplace or Ma

Details

• Version: 1.3.0
• Transports: streamable-http
• Uptime (7 days): 100%
• Median latency: 1297 ms
• First indexed: 2026-11-01T10:08:01.484Z
• Last seen in registry: 2026-11-04T12:17:20.917Z
• Repository: https://github.com/aspern-org/aspern-docs
• Website: https://aspern.org

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