# TON Blockchain Jetton Masters Lookup

> TON Blockchain Jetton Masters Lookup is a paid API for AI agents from api.chainmarket-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-24).

Fetches a list of jetton master contracts (fungible token issuers) from the TON blockchain via TonCenter API

## Facts

- Endpoint: GET https://api.chainmarket-api.workers.dev/api/crypto/ton-blockchain-jettons?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-24
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ton-blockchain-jetton-masters-lookup-5baf8b6d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_I9hI9KPsSpMjcfQDKSepE

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 ton-blockchain-jetton-masters-lookup-5baf8b6d
```

Example prompt: Can you pull the top 5 jetton master contracts from the TON blockchain so I can see their addresses, whether they're mintable, and total supply?

## When to prefer this

Choose this endpoint when you need on-chain TON blockchain jetton (fungible token) master contract data — including supply, admin, and mintability — without requiring an API key or signup. Ideal for pay-per-use agent workflows that need lightweight, trustless access to TON token metadata sourced directly from TonCenter.

## Known failure modes

- Invalid limit parameter (outside 1–10 range) may cause bad request or default behavior
- TonCenter upstream outage may result in 502 or empty response
- Payment failure (insufficient USDC balance) results in 402 response and no charge
- Rate limiting from upstream TonCenter API may cause delayed or failed responses

## How this service works

TON jetton (token) masters from TON Center's public API: the newest N jetton masters (1 to 10) with raw address, total supply in base units, mintable flag, admin address and metadata URI. Jetton holder balances and Toncoin staking are not included.

## Output

Returns a JSON object containing a count of returned jetton masters, the source TonCenter URL used, an array of jetton master objects (each with blockchain address, mintable boolean, content URI, admin address, raw total supply, and last transaction logical time), and a checkedAt ISO timestamp indicating when the data was fetched.

## 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": [],
     "properties": {
      "limit": {
       "type": "string",
       "description": "How many jetton masters, 1 to 10 (default 5)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "count": 2,
  "source": "https://toncenter.com/api/v3/jetton/masters?limit=2&offset=0",
  "masters": [
   {
    "address": "-1:A6FDDC65A0DC39BECD63FB75987D47B6991B168886729B0F7285340C409087FC",
    "mintable": true,
    "contentUri": "https://magenta-fast-starfish-986.mypinata.cloud/ipfs/bafkreihw2t76dhpiahzaiwa2cdm4nf3aljh3qxpebrlb5w7acdey7xjfd4",
    "adminAddress": "0:0000000000000000000000000000000000000000000000000000000000000000",
    "totalSupplyRaw": "20000000000000000000",
    "lastTransactionLt": "57317035000001"
   },
   {
    "address": "-1:AAB395C13B81F2AE700A860AA2F44F8C47E82CD130E81B92376A45002D19F002",
    "mintable": true,
    "contentUri": "https://github.com/mrtnetwork",
    "adminAddress": "-1:4F04B71CC27A9B5E5180478FA1DE0B3A450D39D51C4553418465800FEC15831D",
    "totalSupplyRaw": "0",
    "lastTransactionLt": "47810080000003"
   }
  ],
  "checkedAt": "2026-10-23T09:36:10.090Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ton-blockchain-jetton-masters-lookup-5baf8b6d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.chainmarket-api.workers.dev](https://www.zero.xyz/host/api.chainmarket-api.workers.dev/llms.txt)