# httpay.xyz Protocol TVL Monitor

> httpay.xyz Protocol TVL Monitor is a paid API for AI agents from httpay.xyz, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Tracks TVL changes for a specific DeFi protocol on a given chain, returning current TVL, 24h/7d/30d change percentages, trend, and category via DeFiLlama.

## Facts

- Endpoint: POST https://httpay.xyz/api/protocol-tvl-monitor
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/httpay-xyz-protocol-tvl-monitor-5485d5e6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FvfH6IhctlLi5iM6NDxNH

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 httpay-xyz-protocol-tvl-monitor-5485d5e6 -d '<json body>'
```

Example prompt: What's the current TVL for Uniswap on Base, and how has it changed over the last 24 hours, 7 days, and 30 days?

## When to prefer this

Use this endpoint when you need structured, time-series TVL data for a specific DeFi protocol on a given chain, especially when you want trend context (24h/7d/30d deltas) without managing API keys or subscriptions. Prefer this over raw DeFiLlama API calls when operating in a pay-per-call, agentic context using x402/USDC on Base.

## Known failure modes

- Unknown protocol name returns empty or error response
- Unsupported chain returns no data
- DeFiLlama data lag may cause stale TVL figures
- Payment failure (insufficient USDC) results in 402 response
- Misspelled protocol/chain names yield null results

## How this service works

Track TVL changes across DeFi protocols on Base. Returns top protocols with current TVL, 24h/7d/30d change %, trend, and category. Includes summary: total Base TVL, fastest growing, biggest drop. Powered by DeFiLlama.

## Output

Returns a JSON object with the protocol's current TVL, percentage change over 24h/7d/30d, trend direction, and protocol category. Also includes a summary of total Base TVL, the fastest growing protocol, and the protocol with the biggest TVL drop — all sourced from DeFiLlama.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "description": "Track TVL changes across DeFi protocols on Base. Returns top protocols with current TVL, 24h/7d/30d change %, trend, and category. Includes summary: total Base TVL, fastest growing, biggest drop. Powered by DeFiLlama."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/httpay-xyz-protocol-tvl-monitor-5485d5e6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from httpay.xyz](https://www.zero.xyz/host/httpay.xyz/llms.txt)