# TraceFast Block EIP-7702 Authorizations

> TraceFast Block EIP-7702 Authorizations is a paid API for AI agents from mpp.tracefast.xyz, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-12).

Returns every EIP-7702 authorization-list entry carried by transactions in a specific Ethereum block, including delegation target, chain ID, nonce, and signature, in transaction and list order.

## Facts

- Endpoint: GET https://mpp.tracefast.xyz/api/v1/chains/1/blocks/:number/authorizations?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tracefast-block-eip-7702-authorizations-2888b6f3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7TpkWD5uMt1-5uHlMaMrI

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 tracefast-block-eip-7702-authorizations-2888b6f3
```

Example prompt: Pull all EIP-7702 authorization-list entries from Ethereum block 21500000 — I want the delegation targets, chain IDs, nonces, and signatures in transaction order, up to 50 entries.

## When to prefer this

Use this endpoint when you specifically need EIP-7702 authorization-list data (delegation targets, chain IDs, nonces, signatures) at the block level in transaction order. Prefer this over generic transaction endpoints when your focus is account abstraction, smart account delegation auditing, or EIP-7702 adoption analytics. It is the only endpoint that surfaces the authorization-list sub-structure of EIP-7702 transactions organized by block.

## Known failure modes

- Block number not yet mined or does not exist — returns 404 or empty result
- Block has no EIP-7702 transactions — returns empty list
- Invalid or expired pagination cursor — returns 400 or cursor error
- Limit out of range (must be 1–100) — returns 400 validation error
- Rate limit exceeded — returns 429
- Payment not provided or invalid x402 payment — returns 402

## How this service works

TraceFast live Ethereum data: every EIP-7702 authorization-list entry carried by the transactions of one block — the delegation target, the chain id and nonce it was signed for, and the signature — in transaction order and then list order. Path number: Block height. Query limit: 1..=100, default 25; cursor: `nextCursor` of the previous page. Docs: https://docs.tracefast.xyz/api/block-authorizations.md

## Output

A paginated list of EIP-7702 authorization-list entries for the specified Ethereum block, each containing the delegation target address, the chain ID and nonce the authorization was signed for, and the cryptographic signature — ordered first by transaction position within the block, then by position within each transaction's authorization list. Includes a nextCursor field for pagination when more entries exist.

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "required": [
    "method"
   ],
   "properties": {
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tracefast-block-eip-7702-authorizations-2888b6f3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mpp.tracefast.xyz](https://www.zero.xyz/host/mpp.tracefast.xyz/llms.txt)