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FABRKNT API

Not every DeFi protocol needs TradFi compliance -- but if yours does, you shouldn't have to rebuild from scratch. Fabrknt plugs into your existing protocol with composable SDKs and APIs. No permissioned forks, no separate deployments.

Integration paths: REST API | TypeScript SDKs (npm) | QuickNode Marketplace (coming soon) Jurisdictions: MAS (Singapore), SFC (Hong Kong), FSA (Japan) Pricing: Free tier on all products. Pro from $49/mo. Website: fabrknt.com

npm Packages

All 7 products are published as standalone TypeScript SDKs:

npm install @fabrknt/veil-core @fabrknt/sentinel-core @fabrknt/stratum-core \
  @fabrknt/accredit-core @fabrknt/complr-core @fabrknt/tempest-core @fabrknt/tensor-core
Package Version Product
@fabrknt/complr-core 1.0.0 Complr -- AI compliance engine
@fabrknt/accredit-core 1.0.0 Accredit -- On-chain KYC/AML
@fabrknt/sentinel-core 1.0.0 Sentinel -- Transaction security
@fabrknt/veil-core 1.0.0 Veil -- Privacy and encryption
@fabrknt/stratum-core 1.0.0 Stratum -- State primitives
@fabrknt/tensor-core 1.0.0 Tensor -- Margin engine
@fabrknt/tempest-core 1.0.0 Tempest -- Dynamic fee hook

Seven Plug-in Products (REST API)

Compliance

Product Endpoint What it does
Complr POST /api/quicknode/complr/[apiKey] AI-powered compliance engine (MAS, SFC, FSA), OFAC/TRM Labs/Chainalysis screening, Travel Rule, SAR/STR generation, confidence scoring, human-in-the-loop review queue
Accredit POST /api/accredit On-chain KYC/AML enforcement via Token-2022 transfer hooks, compliant DEX routing, asset wrapping (cUSDC/cSOL), multi-provider KYC (Civic, World ID), Sovereign identity
Sentinel POST /api/sentinel Pre-transaction security analysis (17 patterns: 8 Solana + 9 EVM), simulation sandbox, execution pattern builders (DCA, grid, rebalance), Jito + Flashbots bundle management

Privacy

Product Endpoint What it does
Veil POST /api/veil Chain-agnostic NaCl Box encryption, Shamir secret sharing, Noir ZK proofs, encrypted swap orders for MEV protection, MCP server for AI agents, 5 Solana privacy apps

Data

Product Endpoint What it does
Stratum POST /api/stratum Multi-chain state primitives (800x state reduction): Bitfield, Merkle, Expiry, Events, Resurrection. Solana (Anchor) + EVM (Solidity/Foundry)

DeFi

Product Endpoint What it does
Tensor POST /api/tensor Unified margin engine with Greeks-aware portfolio margining, vol surface interpolation, intent language, solver auctions, ZK credit scores, identity-gated leverage
Tempest POST /api/tempest Uniswap v4 volatility-responsive dynamic fee hook with keeper, staleness fail-safe, dust filter, momentum adjustment, chain-agnostic core SDK

API Reference

All endpoints accept JSON-RPC style requests:

{
  "method": "check_sanctions",
  "params": {
    "address": "0x..."
  }
}

Complr Methods

Method Params Description
screen_wallet address, jurisdictions?, chain? Screen wallet against OFAC/TRM Labs/Chainalysis (multi-chain, auto-detect)
check_transaction transactionId, senderWallet, recipientWallet, amount, currency, chain? Single transaction compliance check across MAS/SFC/FSA
check_batch transactions[] Batch check up to 50 transactions in parallel
query question, jurisdiction? Regulatory knowledge base query with AI-powered answers
query_confident question, jurisdiction? Query with confidence scoring, citations, hallucination detection
generate_report transactionId, jurisdiction, reportType Auto-draft SAR/STR in regulator-specific formats
analyze_obligations document, jurisdiction? Extract structured obligations from regulatory documents

Accredit Methods

Method Params Description
screen_identity address, jurisdictions? Check KYC verification status
check_jurisdiction address, jurisdiction, protocolType?, exposureUsd? Verify jurisdiction eligibility
verify_accreditation address, jurisdiction? Check accredited investor status
check_transfer from, to, jurisdictions?, amountUsd? Validate transfer restrictions + Travel Rule
register_kyc address, kycLevel, investorType, jurisdictions, expiresInDays? Register KYC record

Sentinel Methods

Method Params Description
analyze_transaction transaction, mode?, riskTolerance? Detect threats using 17 patterns (8 Solana + 9 EVM)
simulate_transaction transaction, rpcUrl? Pre-execution simulation with automatic fallback
build_pattern pattern, params Build execution plans (batch payout, DCA, grid, rebalance, vesting)
submit_bundle chain, transactions, blockNumber? Submit atomic bundles via Jito (Solana) or Flashbots (EVM)

Veil Methods

Method Params Description
generate_keypair -- Generate random NaCl Box encryption keypair
derive_keypair seed Derive deterministic keypair from 32-byte seed
encrypt plaintext, recipientPublicKey, senderSecretKey, senderPublicKey NaCl Box encrypt
decrypt bytes, senderPublicKey, recipientSecretKey, recipientPublicKey NaCl Box decrypt
encrypt_multiple plaintext, recipientPublicKeys[], senderSecretKey, senderPublicKey Encrypt for multiple recipients
shamir_split secret, threshold, totalShares Split secret into M-of-N Shamir shares
shamir_combine shares[] Reconstruct secret from Shamir shares
encrypt_order minOutputAmount, slippageBps, deadline, solverPublicKey, userSecretKey, userPublicKey Encrypt DEX swap order for MEV protection
decrypt_order bytes, userPublicKey, solverSecretKey, solverPublicKey Decrypt encrypted swap order

Stratum Methods

Method Params Description
merkle_build leaves[] Build a Merkle tree from a set of leaves
merkle_proof treeId, leafIndex Generate an inclusion proof for a leaf
merkle_verify proof[], root, leaf Verify a proof against a root
bitfield_create capacity Create a new bitfield for compact state tracking
bitfield_set bitfieldId, index Set a bit in a bitfield
bitfield_check bitfieldId, index Check whether a bit is set

Tensor Methods

Method Params Description
compute_greeks asset, spot, strike, expiry, optionType, iv? Black-Scholes greeks with optional vol surface interpolation
calculate_margin positions[] Greeks-aware portfolio margin with delta-netting, gamma/vega charges
solve_intent orders[], currentPositions? Decompose multi-leg intents into optimal execution sequences
analyze_risk positions[] Portfolio-level VaR, liquidation price, gamma concentration limits

Position Object

{
  "id": "p1",
  "type": "perp",
  "asset": "ETH",
  "size": 10,
  "entryPrice": 1900,
  "markPrice": 2000,
  "strike": 2100,
  "expiry": 1788220800,
  "optionType": "call"
}

type: perp | option | spot | lending

Tempest Methods

Method Params Description
estimate_fee pair, volatility, config? Dynamic fee for a trading pair based on volatility
classify_vol_regime pair, volatility, volatility24h? Classify into 5 vol regimes
get_fee_curve pair, config? Full piecewise-linear fee curve across vol range
estimate_il pair, priceChangeRatio, liquidity?, dailyVolume?, feeBps? Impermanent loss estimation with fee offset
optimize_lp_range pair, currentPrice, volatility, timeHorizon?, riskTolerance? LP range recommendation for concentrated liquidity

Volatility Regimes

Regime Annualized Vol Fee Range (bps)
very_low < 20% 5-10
low 20-35% 10-30
normal 35-50% 30-60
high 50-75% 60-150
extreme > 75% 150-500

QuickNode Marketplace

All 7 products will be available as QuickNode Marketplace add-ons with automatic provisioning (coming soon).

Customer API

Each provisioned add-on gets a unique API key. Use it to call the product API:

POST /api/quicknode/{product}/{apiKey}

Where {product} is one of: complr, accredit, sentinel, veil, stratum, tensor, tempest.

Provisioning Lifecycle

Endpoint Description
POST /api/quicknode/provision Create instance when user adds add-on (pass product field)
POST /api/quicknode/deprovision Remove instance when user removes add-on
POST /api/quicknode/update Handle plan changes
POST /api/quicknode/deactivate_endpoint Deactivate endpoint

Plan Limits

Plan Monthly Requests
Free 100
Starter 1,000
Growth 10,000
Business 100,000

Tech Stack

  • Framework: Next.js 16 with App Router
  • Database: PostgreSQL (Supabase) via Prisma 7
  • Language: TypeScript
  • Hosting: Vercel
  • Encryption: NaCl Box / Curve25519-XSalsa20-Poly1305 (Veil)
  • Sanctions Data: Multi-provider (OFAC SDN, TRM Labs, Chainalysis)

Development

pnpm install
cp .env.example .env.local
pnpm run dev          # http://localhost:3000
pnpm run db:generate  # Regenerate Prisma client
pnpm run db:push      # Push schema to database
pnpm test             # Run tests

Environment Variables

DATABASE_URL=postgresql://...
QUICKNODE_PROVISION_USERNAME=your-username
QUICKNODE_PROVISION_PASSWORD=your-password
NEXT_PUBLIC_URL=https://api.fabrknt.com
VEIL_MASTER_KEY=your-encryption-key

Architecture

src/
  lib/
    complr/          AI compliance engine (MAS/SFC/FSA), screening, SAR/STR, confidence scoring
    accredit/        On-chain KYC enforcement, transfer hooks, compliant routing, asset wrapping
    sentinel/        17-pattern threat detection, simulation sandbox, execution patterns, bundles
    veil/            NaCl encryption, Shamir sharing, ZK proofs, encrypted orders, MCP server
    stratum/         Multi-chain state primitives: Merkle, Bitfield, Expiry, Events, Resurrection
    tensor/          Unified margin engine, Greeks, vol surface, intents, solver auctions
    tempest/         Uniswap v4 dynamic fee hook, keeper, vol regimes, LP optimization
    quicknode/       QuickNode Basic Auth middleware
    db.ts            Prisma client
  app/
    api/
      quicknode/     QuickNode provisioning + multi-product customer API
      accredit/      Accredit API
      sentinel/      Sentinel API
      veil/          Veil API
      stratum/       Stratum API
      tensor/        Tensor API
      tempest/       Tempest API

Each product is a standalone service that works independently or together. Stratum provides state primitives (Merkle, Bitfield) used by other products for data integrity. Complr handles off-chain compliance while Accredit handles on-chain enforcement.

Documentation

Per-product user documentation with request/response examples:

Product Docs
Complr docs/complr.md
Accredit docs/accredit.md
Sentinel docs/sentinel.md
Veil docs/veil.md
Stratum docs/stratum.md
Tensor docs/tensor.md
Tempest docs/tempest.md

Related Repos

Repo Description
fabrknt/scorecard DeFi Compliance Readiness dashboard at fabrknt.com
fabrknt/forge Reference app showing all 7 Fabrknt plug-ins in action (uses @fabrknt/*-core SDKs)

License

MIT

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Compliance, privacy, and data infrastructure for DeFi — delivered as REST APIs and QuickNode Marketplace add-ons.

api.fabrknt.com

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