aid: sygnum name: Sygnum description: >- Sygnum is a regulated digital asset banking group, headquartered in Zurich with a Singapore arm, that received a Swiss FINMA banking and securities dealer licence in August 2019. It provides institutional custody, spot and derivatives trading, staking, tokenisation, Lombard lending and 24/7 instant settlement for banks, asset managers, exchanges and corporates. Its B2B business is delivered through an API layer published at developer.sygnum.com — a catalogue covering Banking, Trading (REST and FIX), Custody, Staking, Wallet, Digital Transfer, Sygnum Protect (off-exchange custody), Sygnum Connect (instant settlement) and Market Data (REST and WebSocket) — served from the api.sygnum.com/b2b gateway and secured with OAuth 2.0 client credentials issued from the bank's Auth0 tenant at auth.sygnum.com. The specifications themselves are downloadable only to authenticated Sygnum clients from the developer portal. url: https://raw.githubusercontent.com/api-evangelist/sygnum/refs/heads/main/apis.yml image: https://avatars.githubusercontent.com/sygnumbank x-type: company x-source: harvest:secondary-market x-tier: profiled x-tier-reason: enrichment specificationVersion: '0.20' created: '2026-08-29' modified: '2026-08-29' tags: - Company - Banking - Digital Assets - Cryptocurrency - Custody - Trading - Staking - Tokenization - Settlement - Market Data - Financial-Services - Switzerland - Singapore - B2B tags_raw: - Company - Banking - Digital Assets - Cryptocurrency - Custody - Trading - Staking - Tokenization - Settlement - Market Data - Financial Services - Switzerland - Singapore - B2B apis: - name: Sygnum Banking API description: >- Real-time account and balance retrieval across fiat, digital assets and traditional securities held at Sygnum, with role-based permissions, exposed to B2B partners as REST. humanURL: https://developer.sygnum.com/banking baseURL: https://api.sygnum.com/b2b tags: - Banking - Account - Balances tags_raw: - Banking - Accounts - Balances properties: - type: Authentication url: authentication/sygnum-authentication.yml - name: Sygnum Trading API description: >- Order management and execution for Sygnum's digital asset trading service, offered over both REST and the FIX protocol, with a webhook channel for asynchronous trade events. humanURL: https://developer.sygnum.com/trading baseURL: https://api.sygnum.com/b2b tags: - Trading - Order - FIX tags_raw: - Trading - Orders - FIX properties: - type: FIX url: https://developer.sygnum.com/trading/fix - type: Webhooks url: asyncapi/sygnum-webhooks.yml - name: Sygnum Custody API description: >- Endpoint set designed for bank clients to fetch account balances held in Sygnum's institutional-grade digital asset custody environment. humanURL: https://developer.sygnum.com/custody baseURL: https://api.sygnum.com/b2b tags: - Custody - Digital Assets - name: Sygnum Staking API description: >- Regulated Ethereum staking for retail and institutional clients — real-time staking, automated rewards, flexible amounts and portfolio tracking — with a webhook channel for staking lifecycle events. humanURL: https://developer.sygnum.com/staking baseURL: https://api.sygnum.com/b2b tags: - Staking - Ethereum - Rewards properties: - type: Webhooks url: asyncapi/sygnum-webhooks.yml - name: Sygnum Wallet API description: >- Wallet service API covering wallet resources attached to Sygnum staking and digital asset accounts. humanURL: https://developer.sygnum.com/staking/wallet baseURL: https://api.sygnum.com/b2b tags: - Wallets - Digital Assets tags_raw: - Wallet - Digital Assets - name: Sygnum Digital Transfer API description: >- Digital asset transfer service API for moving assets in and out of Sygnum, with a webhook channel for transfer status events. humanURL: https://developer.sygnum.com/staking/digital-transfer baseURL: https://api.sygnum.com/b2b tags: - Transfers - Digital Assets properties: - type: Webhooks url: asyncapi/sygnum-webhooks.yml - name: Sygnum Protect API description: >- API for Sygnum Protect, the bank's off-exchange custody solution that lets exchanges verify client collateral held at Sygnum without moving it onto the venue. humanURL: https://developer.sygnum.com/protect baseURL: https://api.sygnum.com/b2b tags: - Off-Exchange Custody - Collateral - name: Sygnum Connect API description: >- API for Sygnum Connect, the bank's 24/7 instant multi-asset settlement network for crypto assets, stablecoins and fiat between member institutions. humanURL: https://developer.sygnum.com/connect baseURL: https://api.sygnum.com/b2b tags: - Settlement - Payments - Stablecoins - name: Sygnum Market Data API description: >- Market data service exposed as REST plus a streaming WebSocket channel, so partners can stream prices and monitor markets inside their own systems. humanURL: https://developer.sygnum.com/market-data baseURL: https://api.sygnum.com/b2b tags: - Market Data - Streaming - WebSocket properties: - type: WebSocket url: https://developer.sygnum.com/market-data/web-socket - name: Sygnum Access Management API description: >- Client-management surface of the developer portal — create and manage Auth0 clients, attach credentials (public key or certificate with a key identifier and expiry) and scope their access to Sygnum APIs. humanURL: https://developer.sygnum.com/client-management baseURL: https://api.sygnum.com/b2b tags: - Access Management - Authentication - Credentials tags_raw: - Access Management - OAuth - Credentials properties: - type: OAuthScopes url: scopes/sygnum-scopes.yml maintainers: - FN: Kin Lane email: kin@apievangelist.com - FN: APIs.json email: info@apis.io common: - type: Website url: https://www.sygnum.com/ - type: DeveloperPortal url: https://developer.sygnum.com/ - type: Documentation url: https://developer.sygnum.com/catalog - type: APIReference url: https://developer.sygnum.com/catalog - type: GettingStarted url: https://developer.sygnum.com/how-to-connect - type: SignUp url: https://start.join.sygnum.com/ - type: Login url: https://developer.sygnum.com/login - type: Support url: https://www.sygnum.com/help/ - type: Blog url: https://www.sygnum.com/future-finance/ - type: GitHubOrganization url: https://github.com/sygnumbank - type: PrivacyPolicy url: https://www.sygnum.com/privacy-notice/ - type: TermsOfService url: https://www.sygnum.com/terms-of-use/ - type: Imprint url: https://www.sygnum.com/imprint/ - type: Pricing url: https://www.sygnum.com/help/accounts/custody-fees-at-sygnum/ - type: Plans url: plans/sygnum-plans-pricing.yml - type: RateLimits url: rate-limits/sygnum-rate-limits.yml - type: Authentication url: authentication/sygnum-authentication.yml - type: OAuthScopes url: scopes/sygnum-scopes.yml - type: WellKnown url: well-known/sygnum-well-known.yml - type: OpenIDConnect url: well-known/sygnum-auth-openid-configuration.json - type: Conformance url: conformance/sygnum-conformance.yml - type: Compliance url: conformance/sygnum-conformance.yml - type: ErrorCatalog url: errors/sygnum-problem-types.yml - type: Conventions url: conventions/sygnum-conventions.yml - type: Lifecycle url: lifecycle/sygnum-lifecycle.yml - type: Sandbox url: sandbox/sygnum-sandbox.yml - type: Webhooks url: asyncapi/sygnum-webhooks.yml - type: DomainSecurity url: security/sygnum-domain-security.yml - type: Packages url: packages/sygnum-packages.yml - type: LLMsTxt url: llms/sygnum-llms.txt - type: SecurityTxt url: well-known/sygnum-security.txt - type: Security url: security/sygnum-vulnerability-disclosure.yml - type: VulnerabilityDisclosure url: security/sygnum-vulnerability-disclosure.yml x-enrichment: date: '2026-08-29' status: enriched artifacts_added: 18 pass: local-v1 x-coverage: state: gated reason: customer-only-docs detail: >- Sygnum's developer portal ships a "Download specification" control for each of its ten B2B APIs, but the specifications are served from https://api.sygnum.com/b2b/v1/assets/content/dev-portal-assets-map, which returns HTTP 401 to anyone who is not a logged-in Sygnum client — the portal's own copy says registration requires an existing client relationship. evidence: - url: https://api.sygnum.com/b2b/v1/assets/content/dev-portal-assets-map status: 401 - url: https://api.sygnum.com/b2b/v1/available-scopes status: 401 - url: https://developer.sygnum.com/ status: 200 checked: '2026-08-29'