# Vealth Klima2 Carbon Retirement

> Vealth Klima2 Carbon Retirement is a paid API for AI agents from vealth.net, paid per call via x402, $0.15/call, status unknown (last checked 2026-09-14).

Retires a specified quantity of carbon credits on-chain via the Klima protocol, returning a blockchain transaction hash as proof of retirement.

## Facts

- Endpoint: POST https://vealth.net/.well-known/vealth/klima2-retire
- Price: $0.15/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vealth-klima2-carbon-retirement-1fa83aea
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_T47x5E6IShiCY4cAJTFtP

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 vealth-klima2-carbon-retirement-1fa83aea -d '<json body>'
```

Example prompt: Retire 0.5 tonnes of carbon credits on-chain for me and give me the blockchain transaction proof so I can verify it on Basescan.

## When to prefer this

Choose this endpoint when you need a verifiable, on-chain proof of carbon credit retirement settled on the Base blockchain via KlimaDAO's Klima2 contract. It is ideal for agents automating climate commitments, e-commerce carbon neutrality programs, or any workflow requiring a tamper-proof transaction hash and Basescan link as retirement evidence. Prefer over off-chain carbon registries when blockchain provability and programmatic access matter.

## Known failure modes

- Insufficient USDC balance to cover the $0.15 call fee or underlying carbon cost — payment rejected
- Invalid or non-positive amount_tonnes value — schema validation error
- Network congestion or Base chain RPC failure causing transaction timeout
- Carbon credit liquidity insufficient for requested amount on KlimaDAO
- Malformed request body missing amount_tonnes field

## How this service works

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## Output

Returns a JSON object confirming the retirement action, the version of the Klima contract used (k2), cost in USDC, the on-chain retirement transaction hash, a direct Basescan URL to verify the transaction, and the exact amount of carbon retired in tonnes.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "amount_tonnes": {
   "type": "number"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "action": "retire",
  "version": "k2",
  "cost_usdc": 0.005,
  "retire_tx": "0x…",
  "basescan_url": "https://basescan.org/tx/0x…",
  "amount_tonnes": 0.001
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vealth-klima2-carbon-retirement-1fa83aea/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from vealth.net](https://www.zero.xyz/host/vealth.net/llms.txt)