eth_sendRawTransaction

eth_sendRawTransaction broadcasts a fully signed, RLP-encoded transaction to the Polygon network and returns its 32-byte transaction hash. This is how every state-changing action — a MATIC transfer, a contract deployment, or a contract write — reaches the chain after you sign it client-side. Send it to https://polygon.therpc.io/YOUR_API_KEY (chain ID 137, 0x89); sign with chain ID 137 baked in so the transaction is valid on Polygon PoS and not replayable elsewhere. With ~2-second blocks and low fees, a well-formed transaction is usually picked up within a few seconds of broadcast.

Use cases

• Submit a native MATIC transfer after signing it offline, keeping the private key off the node entirely.
• Deploy a smart contract to Polygon by omitting the to field and setting data to the compiled contract bytecode; the receipt's contractAddress then gives you the deployed address.
• Execute a contract write — for example an ERC-20 transfer on the Polygon USDT token at 0xc2132D05D31c914a87C6611C10748AEb04B58e8F — by signing a call to its method and broadcasting it here.

Parameters

Response

Example request

1curl https://polygon.therpc.io/YOUR_API_KEY \
2  -X POST \
3  -H "Content-Type: application/json" \
4  -d '{
5    "jsonrpc": "2.0",
6    "method": "eth_sendRawTransaction",
7    "params": ["0x..."],
8    "id": 1
9  }'

Try it live in the Polygon playground.

Errors & troubleshooting

Common pitfalls

• The returned hash only proves the node accepted the transaction into its mempool, not that it is confirmed. Poll eth_getTransactionReceipt to track inclusion — on Polygon this is typically a few seconds.
• A successful broadcast does not guarantee on-chain success: a receipt with status: "0x0" means the transaction was included in a Polygon block but reverted, and the sender still paid the gas in MATIC.
• Always fetch a fresh nonce with eth_getTransactionCount immediately before signing to avoid nonce collisions; if you must replace a stuck transaction, resend with the same nonce and bump the fee by at least ~10% or the node returns replacement transaction underpriced.

Supported networks

• Mainnet — Chain ID: 137
• Amoy — Chain ID: 80002

See also

• eth_getTransactionReceipt
• eth_estimateGas
• eth_call

1curl https://polygon.therpc.io/YOUR_API_KEY \
2  -X POST \
3  -H 'Content-Type: application/json' \
4  -d '{"jsonrpc":"2.0","id":1,"method":"eth_sendRawTransaction","params":[""]}'