# Synapse API — Boba Network Token Balances

> Synapse API — Boba Network Token Balances is a paid API for AI agents from synapse-api-brown.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).

Retrieves ERC-20 token balances for a given wallet address on the Boba Network, optionally filtered by specific contract addresses.

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/boba/token/balances
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-boba-network-token-balances-d4ba15d4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_N3lXJRVn9usPFTkXP6lKJ

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 synapse-api-boba-network-token-balances-d4ba15d4 -d '<json body>'
```

Example prompt: Can you fetch all ERC-20 token balances for wallet address 0xAbC123...def on the Boba Network, specifically for these contracts: 0xToken1... and 0xToken2...?

## When to prefer this

Choose this endpoint when you specifically need ERC-20 token balance data on the Boba Network (L2). Prefer it over generic multi-chain endpoints when your query is Boba-specific. Useful for DeFi portfolio views, compliance snapshots, or wallet audits scoped to Boba. The pay-per-call x402 model makes it suitable for low-frequency lookups without subscription overhead.

## Known failure modes

- Invalid or malformed wallet address returns an error or empty result
- Non-existent contract address returns zero balance or error
- Network downtime or Boba RPC issues cause timeouts
- Missing required 'owner' field results in a 400 bad request
- Payment failure via x402 prevents the call from executing

## How this service works

High-speed API suite for AI processing, web scraping, and smart data utilities across 57+ blockchain networks. Pay-per-call via x402.

## Output

Returns a list of ERC-20 token balances associated with the given wallet address on the Boba Network, including token contract addresses and corresponding balance amounts for each token held (optionally filtered to specified contracts).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "owner": {
   "type": "string"
  },
  "contractAddresses": {
   "type": "array",
   "items": {
    "type": "string"
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synapse-api-boba-network-token-balances-d4ba15d4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from synapse-api-brown.vercel.app](https://www.zero.xyz/host/synapse-api-brown.vercel.app/llms.txt)