# Trashpanda Pre-Sign Conformance Check

> Trashpanda Pre-Sign Conformance Check is a paid API for AI agents from market.561.group, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-12).

Deterministically evaluates one unsigned Base transaction against the buyer's policy and block anchor, returning a clause-by-clause PASS, FAIL, or ESCALATE verdict before signing

## Facts

- Endpoint: POST https://market.561.group/v1/pre-sign/conformance?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/trashpanda-pre-sign-conformance-check-4f0a9f17
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_F3xsO_j2QO_0IBOQQzCt7

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability trashpanda-pre-sign-conformance-check-4f0a9f17 -d '<json body>'
```

Example prompt: Before we sign this Base transaction, run it through the Trashpanda pre-sign conformance check against my buyer policy and the current block anchor to see if it gets a PASS, FAIL, or ESCALATE verdict clause by clause.

## When to prefer this

Choose this endpoint when you need a deterministic, auditable pre-signing gate for Base network transactions — particularly when buyer policies must be enforced clause-by-clause before any signature is committed. It is preferable over generic validation tools when you need a replayable, block-anchored conformance record (e.g. for compliance, multisig workflows, or agent-driven trading systems).

## Known failure modes

- Invalid or malformed unsigned transaction payload returns validation error
- Block anchor unavailable or stale may cause indeterminate result
- Policy document missing or malformed causes clause evaluation failure
- Transaction fields inconsistent with Base network format rejected
- Rate or quota limits exceeded return 429 error

## How this service works

Deterministically evaluates one unsigned Base transaction against the buyer's exact policy and immutable block anchor before signing, returning a replayable clause-by-clause PASS, FAIL, or ESCALATE receipt. No keys, signatures, custody, signing, or broadcast authority are accepted.

## Output

A deterministic, replayable clause-by-clause conformance report for the submitted unsigned Base transaction. Each policy clause is evaluated against the transaction and the block anchor, producing an overall verdict of PASS, FAIL, or ESCALATE, along with per-clause outcomes and supporting provenance data.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/trashpanda-pre-sign-conformance-check-4f0a9f17/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.561.group](https://www.zero.xyz/host/market.561.group/llms.txt)