# Bridge TVL Lookup via x402helper

> Bridge TVL Lookup via x402helper is a paid API for AI agents from x402helper.xyz, paid per call via x402, $0.013/call, status unknown (last checked 2026-10-31).

Returns total value locked (TVL) data for a specified cross-chain bridge, accessible via USDC micropayment.

## Facts

- Endpoint: GET https://x402helper.xyz/89e509/bridge/tvl?utm_source=zero.xyz
- Price: $0.013/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/bridge-tvl-lookup-via-x402helper-0451488d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TvLYNArK9jBOTdIKe5904

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 bridge-tvl-lookup-via-x402helper-0451488d
```

Example prompt: What's the current total value locked for the Stargate bridge?

## When to prefer this

Use this endpoint when an AI agent needs on-demand TVL data for a specific cross-chain bridge and is operating within an x402 micropayment-enabled workflow. Prefer this over free aggregator APIs when you need a pay-per-call model without API key setup, or when integrating bridge data into an autonomous agent pipeline that already handles USDC payments.

## Known failure modes

- Unknown or unsupported bridge name returns an error or empty result
- Payment failure (insufficient USDC) results in 402 response and no data
- Malformed bridge parameter returns validation error
- Bridge data temporarily unavailable returns partial or empty result object

## How this service works

X402 micropayments server — AI agents pay USDC for OFAC screening, rates, and billing verification.

## Output

Returns a JSON object with a success flag and a result object containing TVL data for the specified bridge (e.g. total value locked in USD, possibly broken down by chain or asset). Exact fields depend on the bridge queried.

## 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": [
      "bridge"
     ],
     "properties": {
      "bridge": {
       "type": "string",
       "default": null,
       "description": "Bridge name, slug or alias (e.g. Stargate, Across, Wormhole, Arbitrum, CCTP). Resolved case-insensitively to the covered set."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {},
  "success": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/bridge-tvl-lookup-via-x402helper-0451488d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402helper.xyz](https://www.zero.xyz/host/x402helper.xyz/llms.txt)