# Glassnode Bridges Net Flow By Chain (ETH)

> Glassnode Bridges Net Flow By Chain (ETH) is a paid API for AI agents from x402.glassnode.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Returns the net USD value of ETH flowing into or out of Ethereum bridge smart contracts (bridge deposits minus bridge withdrawals) over a 24-hour interval.

## Facts

- Endpoint: GET https://x402.glassnode.com/v1/metrics/bridges/net_volume_by_chain
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/glassnode-bridges-net-flow-by-chain-eth-e01b8dfa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_S9bYlnj5HF2-_sLYN8XhY

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 glassnode-bridges-net-flow-by-chain-eth-e01b8dfa
```

Example prompt: What's the net USD value flowing in or out of Ethereum via bridge contracts over the last 24 hours? Pull the Glassnode bridge net volume data for ETH denominated in USD.

## When to prefer this

Use this endpoint when you need on-chain Ethereum bridge flow analytics — specifically the net directional capital movement (deposits minus withdrawals) across bridge contracts in USD terms, sourced from Glassnode's institutional-grade blockchain data. Prefer this over generic DeFi APIs when you need precise, chain-level bridge net flow with historical 24h resolution.

## Known failure modes

- Missing required 'a' parameter (asset symbol) returns a 400 or validation error
- Unsupported asset symbol (only ETH is allowed) returns an error
- Payment failure (insufficient USDC balance or x402 protocol error) blocks the request
- Rate limiting or quota exceeded returns a 429 error
- Service unavailability returns a 503 with no data

## How this service works

Bridges Net Flow By Chain — The net USD value flowing into or out of Ethereum bridge smart contracts, computed as bridge deposits minus bridge withdrawals. Equivalently, the net USD value moving in or out of the Ethereum blockchain via bridges. Data by Glassnode.

## Output

An array of timestamped data points, each containing an object with the net USD bridge flow value (deposits minus withdrawals) for Ethereum at 24-hour resolution. Negative values indicate net outflows from Ethereum; positive values indicate net inflows.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "a"
     ],
     "properties": {
      "a": {
       "enum": [
        "ETH"
       ],
       "type": "string",
       "description": "Asset symbol, e.g. BTC, ETH"
      },
      "c": {
       "enum": [
        "usd"
       ],
       "type": "string",
       "description": "Currency for denominated values, e.g. usd, native"
      },
      "f": {
       "enum": [
        "csv",
        "json"
       ],
       "type": "string",
       "description": "Response format: json or csv"
      },
      "i": {
       "enum": [
        "24h"
       ],
       "type": "string",
       "description": "Time interval / resolution, e.g. 24h, 1w, 1month"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "array",
     "items": {
      "type": "object",
      "properties": {
       "o": {
        "type": "object"
       },
       "t": {
        "type": "number"
       }
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/glassnode-bridges-net-flow-by-chain-eth-e01b8dfa/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.glassnode.com](https://www.zero.xyz/host/x402.glassnode.com/llms.txt)