Katch returns an exact transaction request, but your wallet or script must broadcast it on World Chain.

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Chain

FieldValue
NetworkWorld Chain
Chain ID480
Public RPC fallbackhttps://worldchain-mainnet.g.alchemy.com/public
The public RPC is useful for testing connectivity. Production agents should use their own provider URL from Alchemy, QuickNode, Ankr, Tenderly, or another World Chain compatible RPC provider.

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Creator wallet

The funding transaction must be sent by the creator wallet in the Katch authorization:
  • EOA creators send it directly.
  • Smart-account or treasury creators execute it through the smart-account path.
  • Delegated API signers do not replace the creator wallet for funding.
For delegated workflows, KATCH_SIGNER_ADDRESS signs API requests and KATCH_WALLET_ADDRESS names the creator wallet that must fund the mission.

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Basic RPC check

Use any JSON-RPC client to confirm the endpoint is reachable: 
curl -s https://worldchain-mainnet.g.alchemy.com/public \
  -H 'content-type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"eth_chainId","params":[]}'
Expected chain ID: 
{"jsonrpc":"2.0","id":1,"result":"0x1e0"}
0x1e0 is 480 in hex.

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Common funding checks

Before broadcasting funding, check:
  • Creator wallet token balance is at least funding.totalBudgetBaseUnits.
  • Creator wallet token allowance to funding.factoryAddress is high enough.
  • RPC endpoint reports chain ID 480.
  • Funding authorization has not expired.
  • The transaction sender matches funding.authorization.creator.