# TraceFast Ethereum Address Native Balance History

> TraceFast Ethereum Address Native Balance History 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 daily native ETH balance snapshots, net daily changes, event counts, and USD valuations for an Ethereum address over a configurable window of days

## Facts

- Endpoint: GET https://mpp.tracefast.xyz/api/v1/chains/1/entities/:address/balance-history?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-ethereum-address-native-balance-history-9d4b0795
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VqlOumyYO14DicVimRwdH

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-ethereum-address-native-balance-history-9d4b0795
```

Example prompt: Show me the daily ETH balance history for 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 over the last 60 days — include the net change per day, how many balance events occurred, and the USD value at each day's close.

## When to prefer this

Use this endpoint when you need a day-by-day historical view of an Ethereum address's native ETH balance including USD valuations — ideal for portfolio tracking, audit trails, accumulation pattern analysis, or treasury monitoring. Prefer this over a current-balance endpoint when temporal trend data matters. Choose this over token-balance endpoints when you specifically need the native ETH (not ERC-20) balance history.

## Known failure modes

- Invalid or malformed Ethereum address (non-0x-prefixed or wrong length) returns an error
- Limit parameter out of range (0 or >365) returns a validation error
- Address with no on-chain balance-change history returns empty result set
- Upstream Ethereum node or indexing lag may cause most-recent day to be incomplete
- Payment failure (x402 protocol) blocks the response if USDC balance is insufficient

## How this service works

TraceFast live Ethereum data: the address's native balance at the end of each day it changed, oldest first, with the net change and the number of balance-changing events per day, the USD value at each closed day's last hour, and totals over the window. Path address: The address, `0x`-prefixed, 40 hex characters, any case. Query limit: Most recent days with a balance change to return, 1..=365, default 90. Docs: https://docs.tracefast.xyz/api/address-balance-history.md

## Output

Returns a time-series of daily records sorted oldest-first, each containing: the date, end-of-day native ETH balance, net balance change for that day, count of balance-changing on-chain events, and the USD value of the balance as of that day's last hour. Also includes aggregate totals (total net change, total events) over the full window.

## 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-ethereum-address-native-balance-history-9d4b0795/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)