bor_getCurrentProposer — Polygon JSON-RPC

Status: Available

Returns the address of the validator currently scheduled to propose blocks on Polygon's Bor consensus layer.

POSThttps://triport.io/polygon

Network: Polygon
Scope: polygon_bor
Auth: x-token: $TRIPORT_API_KEY (or Authorization: Bearer)
Rate limit: Pro and above — rate limited per tier with a short burst allowance; no daily quota

Endpoint and plans: Polygon RPC endpoint.

Request

cURLJavaScriptPython

curl https://triport.io/polygon \
  -H "Authorization: Bearer $TRIPORT_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "bor_getCurrentProposer",
    "params": []
  }'

const res = await fetch("https://triport.io/polygon", {
  method: "POST",
  headers: {
    "Authorization": `Bearer ${process.env.TRIPORT_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "jsonrpc": "2.0",
    "id": 1,
    "method": "bor_getCurrentProposer",
    "params": []
  }),
});
const data = await res.json();
console.log(data);

import os


import requests


resp = requests.post(
    "https://triport.io/polygon",
    headers={
        "Authorization": f"Bearer {os.environ['TRIPORT_API_KEY']}",
        "Content-Type": "application/json",
    },
    json={
        "jsonrpc": "2.0",
        "id": 1,
        "method": "bor_getCurrentProposer",
        "params": [],
    },
)
data = resp.json()
print(data)

Response

JSON

Example

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x0375b2fc7140977c9c76d45421564e354ed42277"
}

bor_getCurrentProposer returns a single 0x-prefixed address: the signer of the validator that is the current block proposer on Polygon. This is part of the bor namespace — Polygon's Bor (Proof-of-Stake) consensus extension — and is not exposed by standard EVM/Geth methods.

The proposer rotates every block (Polygon block time is ~2.1s), selected by stake weight within the active validator set. Because the answer changes so frequently, this method is best suited to real-time "who is proposing right now" lookups — for example, MEV pre-confirmation logic or live validator dashboards. Poll it once per block at most; the value is stale almost immediately after it is read.

If you need the full proposer schedule for an epoch rather than the single current proposer, call bor_getSnapshot instead, which returns the validator set together with the recent-signers history. To resolve the proposer (author) of a historic block, use bor_getAuthor.

This is a bor-namespace method available on the Pro tier and above. It is rate limited per tier with a short burst allowance; there is no daily quota.

Parameters

This method takes no parameters. Pass an empty array.

——optional

No parameters. params must be [].

Response

Response fields

Field	Type	Description
`result`	string	The `0x`-prefixed 20-byte signer address of the validator currently scheduled to propose.

Errors

Code	Meaning	When it happens
`403`	`tier_insufficient`	Your API key's tier is below Pro; this `bor`-namespace method is not enabled for it. The `error.data` carries `current_tier`, `required_tier`, and `upgrade_url`.
`429`	`rate_limited`	You exceeded your tier's request rate (including burst). Honor the `Retry-After` header / `error.data.retry_after_sec` and retry after a short back-off.

See the shared error envelope reference for the full error object shape and handling guidance.

Examples

JavaScript (fetch)

JavaScript

const res = await fetch("https://triport.io/polygon", {
  method: "POST",
  headers: {
    "Authorization": `Bearer ${process.env.TRIPORT_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    jsonrpc: "2.0",
    id: 1,
    method: "bor_getCurrentProposer",
    params: [],
  }),
});


const { result } = await res.json();
console.log("current proposer:", result);

Notes

The proposer changes every block (~2.1s). Treat the result as a point-in-time snapshot; do not cache it across blocks.
For the full epoch proposer schedule (validator set + recent signers), use bor_getSnapshot. For the proposer of a specific historic block, use bor_getAuthor. For the active validator set with stake weights, see bor_getCurrentValidators.
bor_* methods reflect Polygon Bor consensus state and have no Ethereum equivalent.