# BaseBuilder DeFi Token Pairs

> BaseBuilder DeFi Token Pairs is a paid API for AI agents from bb-defi.vercel.app, paid per call via x402, $0.094862/call, status unknown (last checked 2026-09-15).

Retrieves DEX token pair data for decentralized exchange analysis on Base chain

## Facts

- Endpoint: POST https://bb-defi.vercel.app/api/dex/token-pairs
- Price: $0.094862/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/basebuilder-defi-token-pairs-73e88af6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4aZHJe53zyG07F7V8TH2-

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 basebuilder-defi-token-pairs-73e88af6 -d '<json body>'
```

Example prompt: Find all DEX token pairs for USDC on Base chain — I want to see which liquidity pools it's in and the paired tokens.

## When to prefer this

Use this endpoint when you need to discover which DEX liquidity pools a specific token participates in on Base chain, or when building DeFi analytics that require token pair data from decentralized exchanges. Prefer this over on-chain RPC calls when you want a pre-aggregated, API-accessible result without querying the blockchain directly.

## Known failure modes

- Token address not found — returns empty results or 404
- Invalid token symbol or address format — returns 400 bad request
- DEX not supported — returns error or empty pair list
- Payment not processed — returns 402 Payment Required
- Rate limit exceeded — returns 429

## How this service works

BaseBuilder Defi API hub - 22 paid endpoints

## Output

Returns a list of token pairs from DEX liquidity pools, including paired token addresses, pool identifiers, and metadata relevant to trading on Base chain.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/basebuilder-defi-token-pairs-73e88af6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bb-defi.vercel.app](https://www.zero.xyz/host/bb-defi.vercel.app/llms.txt)