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Before you start

Application compliance requires a deployed contract that inherits PredicateClient. A policyID set on the contract binds it to your offchain policy configuration — this is what allows anyone with a valid attestation to access your application. The Predicate API uses the contract address to look up the associated policy and evaluate attestation requests against it.
Offchain-only enforcement? A deployed contract is still required to associate a policy. If you don’t need onchain enforcement right now, deploy the minimal PredicateHolding contract to any supported chain then skip to step 2.

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Integration Steps

1

Onchain Integration

Require users to provide an authentic attestation from Predicate in order to access your business logic
2

Dashboard Setup

Configure your organization, set your policy, and generate an API key
Requires an invitation from the Predicate team, please contract us to request access
3

Offchain Integration

Fetch and embed Predicate attestations into transactions on behalf of yourself or your users so that they can be enforced onchain.

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Supported Blockchains

Application Compliance is available on any chain where the Predicate Registry has been officially deployed.
ChainAddress
Ethereum0xe15a8Ca5BD8464283818088c1760d8f23B6a216E
Base0xe15a8Ca5BD8464283818088c1760d8f23B6a216E
Arbitrum0xe15a8Ca5BD8464283818088c1760d8f23B6a216E
Hyperliquid0xe15a8Ca5BD8464283818088c1760d8f23B6a216E
Plume0xe15a8Ca5BD8464283818088c1760d8f23B6a216E
BSC0xe15a8Ca5BD8464283818088c1760d8f23B6a216E
Plasma0xe15a8Ca5BD8464283818088c1760d8f23B6a216E
World0xe15a8Ca5BD8464283818088c1760d8f23B6a216E
Sepolia0xe15a8Ca5BD8464283818088c1760d8f23B6a216E
SolanaGjXtvmWihnf22Bg48srpzYrs6iGhSUvu1tzsf9L4u9Ck

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Predicate Registry

The Predicate Registry is the core onchain contract which applications leverage to verify compliance attestations. It has two primary responsibilities:
  • Attester management — Stores authorized attester addresses that can sign attestations
  • Attestation verification — Validates the authenticity of attestations

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FAQ

Predicate Labs owns and operates the registry.
The registry uses the ERC-1967 upgradeable proxy pattern:
  • Proxy contract — The address you interact with, which delegates calls to the implementation
  • Implementation contract — Contains the logic and can be upgraded by the owner
  • Two-step ownership — Uses Ownable2StepUpgradeable so ownership transfers require explicit acceptance
Keys are rotated on a frequent basis. New keys are registered before old keys are deregistered, ensuring zero downtime during rotation.
ECDSA on EVM chains, Ed25519 on Solana.
Each attestation includes a unique UUID that is marked as spent after validation. The chain ID is also included in the signed hash to prevent cross-chain replay.