Fireblocks Digital Asset Custody API
Fireblocks digital asset security platform REST API for banks, exchanges, hedge funds, and digital asset businesses to securely custody, transfer, and settle digital assets using MPC-CMP technology. Enables AI agents to manage digital asset vault creation and wallet configuration for institutional custody automation, handle multi-party computation (MPC) transaction signing and approval workflow for digital asset transfer automation, access policy engine configuration for automated transaction governance and risk control automation, retrieve real-time asset balance and transaction status for digital asset portfolio management automation, manage staking and DeFi protocol interaction for yield optimization automation, handle network fee estimation and optimization for on-chain transaction cost management automation, access NFT minting and management for tokenization program automation, retrieve smart contract interaction and deployment for blockchain application automation, manage sub-account and segregated wallet structure for digital asset custodian operations automation, and integrate Fireblocks with exchanges, prime brokers, DeFi protocols, and banking systems for end-to-end institutional digital asset operations.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Institutional crypto custody. SOC2, ISO27001, CCSS. API key + RSA JWT. US/EU. Digital asset transactions and MPC wallet operations.
⚡ Reliability
Best When
A bank, hedge fund, exchange, or digital asset business wanting AI agents to automate institutional digital asset custody, MPC transaction approval workflows, DeFi interactions, and cross-chain settlement within Fireblocks' institutional platform.
Avoid When
SEC BROKER-DEALER CUSTODY RULE FOR DIGITAL ASSETS: Automated digital asset custody operations via Fireblocks for registered investment advisers or broker-dealers must comply with SEC custody rule requirements; SEC's evolving position on digital asset custody creates regulatory uncertainty for automated custody workflows; engage securities counsel before automated RIA digital asset custody deployment. FinCEN VIRTUAL ASSET SERVICE PROVIDER REGISTRATION: Automated digital asset transfer services using Fireblocks infrastructure may constitute Money Services Business activity requiring FinCEN registration; automated cross-border digital asset transfers without FinCEN registration and AML program creates BSA violation. FATF TRAVEL RULE FOR INSTITUTIONAL TRANSFERS: Automated digital asset transfers above $3,000 between virtual asset service providers via Fireblocks must comply with FATF Travel Rule (FinCEN Travel Rule in US); automated transfers without originator and beneficiary information exchange creates Travel Rule compliance failure for VASP-to-VASP transactions.
Use Cases
- • Transferring digital assets from institutional custody automation agents
- • Signing transactions from MPC governance workflow agents
- • Managing DeFi positions from yield optimization automation agents
- • Minting tokenized assets from institutional tokenization agents
Not For
- • Retail crypto exchange user wallets (use Coinbase or Kraken retail APIs)
- • Crypto payment processing for merchants (use BitPay or NOWPayments)
- • DeFi-only trading without custodial requirement
Interface
Authentication
Fireblocks uses API key with RSA JWT signing for API authentication. REST API with JSON and SDKs. New York HQ (with Tel Aviv R&D). Founded 2018 by Michael Shaulov, Pavel Berengoltz, and Idan Ofrat. Private (~$1B raised, Sequoia, Coatue, General Atlantic). Valued at $8B (2022). MPC-CMP multi-party computation technology for key security. 1,800+ institutional customers. 40+ blockchain networks. Policy Engine for automated transaction governance. Connects to 50+ exchanges, prime brokers, and liquidity providers. Competes with BitGo, Anchorage Digital, and Copper for institutional digital asset custody.
Pricing
New York NY. Private (~$1B raised, $8B valuation 2022). Annual subscription. AUC and volume-based pricing. Sandbox available. No free tier.
Agent Metadata
Known Gotchas
- ⚠ MPC TRANSACTION SIGNING REQUIRES COSIGNER AVAILABILITY: Fireblocks MPC-CMP transaction signing requires the co-signer (mobile app, server, Hardware Wallet) to be online and available; automated transaction signing workflows must verify co-signer availability before transaction submission; automated transfer workflows that submit transactions when co-signer is offline create pending transaction queue that may expire or require manual recovery
- ⚠ POLICY ENGINE RULE EVALUATION ORDER FOR AUTOMATED GOVERNANCE: Fireblocks Policy Engine evaluates transaction rules in defined order; automated transaction governance agents must design policy rules with explicit priority ordering; policy rule conflicts where multiple rules apply to same transaction type creates unpredictable approval workflow behavior
- ⚠ RSA JWT API KEY ROTATION FOR LONG-RUNNING AGENTS: Fireblocks API authentication uses RSA key pair signing; automated agents must implement API key rotation for long-running operations; expired RSA key creates authentication failure for all automated operations until key rotation is completed; implement proactive key rotation before expiration in automated workflows
- ⚠ NETWORK FEE VOLATILITY FOR AUTOMATED SETTLEMENT: On-chain transaction fees (ETH gas, BTC mining fees) are highly volatile; automated settlement agents using Fireblocks should implement fee ceiling logic; automated settlement without fee ceiling may execute transfers at economically unacceptable gas prices during network congestion
- ⚠ TRAVEL RULE COMPLIANCE FOR INSTITUTIONAL TRANSFERS: Fireblocks supports FATF Travel Rule compliance via integrations (Notabene, Sygna); automated institutional transfers above threshold must include Travel Rule data exchange with recipient VASP; automated transfers without Travel Rule data exchange creates compliance failure for regulated institutional digital asset transfer workflows
- ⚠ WEBHOOK SIGNATURE VERIFICATION FOR TRANSACTION EVENTS: Fireblocks webhooks include HMAC signature for event authenticity; automated transaction event processing must verify webhook signature before acting on transaction status; automated workflow that processes unsigned or incorrectly signed webhooks creates potential double-processing from spoofed transaction events
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Scores are editorial opinions as of 2026-03-07.