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Your Builder Code is a bytes32 identifier that attributes orders routed through your application to your builder profile. Attach it to every order you submit — no additional authentication is required.

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Accessing Your Builder Profile

1

Direct Link

Go to polymarket.com/settings?tab=builder
2

From Menu

Click your profile image → Select “Builders”

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Getting Your Builder Code

In the Builder Code section of your profile, copy the bytes32 value. It looks like: 
0x0000000000000000000000000000000000000000000000000000000000000001
Store it in your environment variables or a secrets manager.
Builder codes are public identifiers — they appear onchain in the builder field of every order you attribute. Only you control which orders include your code, so keep it scoped to the apps you own.

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Profile Settings

Your builder profile includes customizable settings:
SettingDescription
Profile PictureDisplayed on the Builder Leaderboard
Builder NamePublic name shown on the leaderboard
Builder AddressYour unique builder identifier (read-only)
Builder CodeThe bytes32 code you attach to orders
Current TierYour rate limit tier: Unverified, Verified, or Partner

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Environment Variables

Store your builder code as an environment variable:
.env
POLY_BUILDER_CODE=0x0000000000000000000000000000000000000000000000000000000000000001

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Using Your Builder Code

Pass builderCode on every order to attribute it to your builder profile: 
const response = await client.createAndPostOrder(
  {
    tokenID: "0x...",
    price: 0.55,
    size: 100,
    side: Side.BUY,
    builderCode: process.env.POLY_BUILDER_CODE!,
  },
  { tickSize: "0.01", negRisk: false },
);
See Order Attribution for full details.

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Troubleshooting

Cause: You’ve exceeded your tier’s daily transaction limit.Solution:
Cause: You haven’t created a builder profile yet.Solution: Go to polymarket.com/settings?tab=builder and set up your profile to get a builder code.

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Next Steps

Attribute Orders

Attach your builder code to orders for volume credit.

Understand Tiers

Learn about rate limits and how to upgrade.