# HALOWERK marktwerk Bridge Activity Lookup

> HALOWERK marktwerk Bridge Activity Lookup is a paid API for AI agents from markt.netzhandwerker.de, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-15).

Returns bridge transaction volume and activity metrics for a specified L2/L3 blockchain chain over a 24-hour or 7-day window

## Facts

- Endpoint: POST https://markt.netzhandwerker.de/bridge
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-marktwerk-bridge-activity-lookup-a1b761e6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Z9UGB_dtF-MW88RMr7BER

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 halowerk-marktwerk-bridge-activity-lookup-a1b761e6 -d '<json body>'
```

Example prompt: What's the bridge activity on Base for the last 24 hours — pull the volume and transaction metrics from marktwerk?

## When to prefer this

Choose this endpoint when you need programmatic, pay-per-call bridge activity metrics for specific L2 or L3 chains using L2BEAT slugs, especially in agent workflows where you want real-time or recent (24h/7d) bridge volume data without a subscription. Ideal when operating on Base Mainnet with USDC micropayments via x402 protocol.

## Known failure modes

- Invalid chain slug not matching L2BEAT identifiers returns an error
- Chain parameter set to a Layer 1 (e.g. Ethereum mainnet) is rejected — L2/L3 only
- Invalid period value outside '24h' or '7d' enum returns a validation error
- Payment failure via x402 (insufficient USDC balance) returns 402 status
- Network or upstream data unavailability may return 503 or empty payload

## How this service works

HALOWERK marktwerk — bezahlte Endpunkte nach x402. Preise in USDC auf Base Mainnet.

## Output

Returns bridge transaction volume and activity metrics for the specified L2/L3 chain over the requested observation window (24h or 7d), including quantitative data points sourced from L2BEAT chain identifiers.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "chain": {
   "type": "string",
   "default": "base",
   "pattern": "^[a-z0-9_-]{2,32}$",
   "description": "Chain to measure, as L2BEAT id or slug, for example base, arbitrum, op-mainnet, linea, scroll, starknet. Layer 2 and layer 3 chains only."
  },
  "period": {
   "enum": [
    "24h",
    "7d"
   ],
   "type": "string",
   "default": "24h",
   "description": "Length of the observed window: 24h or 7d."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/halowerk-marktwerk-bridge-activity-lookup-a1b761e6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from markt.netzhandwerker.de](https://www.zero.xyz/host/markt.netzhandwerker.de/llms.txt)