aid: polysign name: PolySign description: >- PolySign, Inc. is an Oakland / San Francisco / New York financial technology company building blockchain-enabled infrastructure for institutional digital asset capital markets and payments. Founded by Arthur Britto, David Schwartz and Jack McDonald, PolySign operates a third-generation permissioned blockchain and the AtomicNet settlement network, and was the parent of Standard Custody & Trust Company, the NYDFS-regulated digital asset custody, trading and settlement platform acquired by Ripple in 2024. PolySign publishes three OpenAPI 3.0.3 contracts for AtomicNet — the AtomicNet API Server (node interface for assets, orders, escrow and beneficiary authorizations, settlements, settlement confirmations, book transfers, partners and investors), the AtomicNet Merchant Gate Node, and the AtomicNet ABC Proxy Service (account registration, digest memorialization, signing and testnet faucet) — all authenticated with OAuth 2.0 client credentials issued by a PolySign-hosted token endpoint. image: https://www.polysign.io/images/logo.png url: https://raw.githubusercontent.com/api-evangelist/polysign/refs/heads/main/apis.yml x-type: company x-source: harvest:secondary-market specificationVersion: '0.21' created: '2026-08-02' modified: '2026-08-02' tags: - digital-assets - blockchain - institutional-custody - settlement - escrow - capital-markets - payments - fintech - distributed-ledger - atomicnet maintainers: - FN: Kin Lane email: kin@apievangelist.com - FN: APIs.json email: info@apis.io apis: - name: AtomicNet API Server description: >- The node-side REST interface for interacting with an AtomicNet node — registering assets and partners, publishing orders and book transfers, requesting and approving escrow and beneficiary authorizations, publishing settlements, releasing settlement and book transfer confirmations, polling status updates, minting one-time investor identifiers, canonicalization and UID utilities, data synchronization, and system health / circuit-breaker checks. Fifty-six operations secured with OAuth 2.0 client credentials. humanURL: https://docs.polynet.sandbox.polysign.io/ x-baseurl-note: >- The published OpenAPI carries no servers[] block and no public AtomicNet node host resolves in DNS — AtomicNet is a participant-deployed network, so the base URL is deployment-specific. All paths are rooted at /v1. Recorded rather than guessed. tags: - digital-assets - settlement - escrow - capital-markets - atomicnet - blockchain properties: - type: Documentation url: https://docs.polynet.sandbox.polysign.io/ - type: APIReference url: https://docs.polynet.sandbox.polysign.io/ - type: OpenAPI url: openapi/polysign-atomicnet-api-server-openapi.json - type: Overlay url: overlays/polysign-atomicnet-api-server-overlay.yaml - name: AtomicNet Merchant Gate Node description: >- The merchant-facing gate onto an AtomicNet node: submit an order, submit a book transfer, and register assets to the node, alongside the shared authentication and system health surface. Eight operations secured with OAuth 2.0 client credentials. humanURL: https://docs.polynet.sandbox.polysign.io/merchant-gate.html x-baseurl-note: >- No servers[] block is published and the node is participant-deployed; all paths are rooted at /v1. tags: - digital-assets - payments - merchant - atomicnet - settlement properties: - type: Documentation url: https://docs.polynet.sandbox.polysign.io/merchant-gate.html - type: APIReference url: https://docs.polynet.sandbox.polysign.io/merchant-gate.html - type: OpenAPI url: openapi/polysign-merchant-gate-openapi.json - type: Overlay url: overlays/polysign-merchant-gate-overlay.yaml - name: AtomicNet ABC Proxy Service description: >- Proxy service for the ABC ledger: register an ABC account against an AtomicNet ID, look up account information, memorialize a digest and verify that a digest was memorialized, sign a digest and verify a signature, and create and faucet accounts on the ABC testnet. Fourteen operations secured with OAuth 2.0 client credentials. humanURL: https://docs.polynet.sandbox.polysign.io/abc-service.html x-baseurl-note: >- No servers[] block is published and the node is participant-deployed; all paths are rooted at /v1. tags: - digital-assets - blockchain - cryptography - atomicnet - testnet properties: - type: Documentation url: https://docs.polynet.sandbox.polysign.io/abc-service.html - type: APIReference url: https://docs.polynet.sandbox.polysign.io/abc-service.html - type: OpenAPI url: openapi/polysign-abc-proxy-service-openapi.json - type: Overlay url: overlays/polysign-abc-proxy-service-overlay.yaml common: - type: Website url: https://www.polysign.io/ - type: SecondaryMarket url: https://forgeglobal.com/polysign_stock/ - type: Documentation url: https://docs.polynet.sandbox.polysign.io/ - type: APIReference url: https://docs.polynet.sandbox.polysign.io/ - type: GitHubOrganization url: https://github.com/PolySignInc - type: Support url: https://www.polysign.io/contact.html - type: LegalNotice url: https://www.polysign.io/legal.html - type: Twitter url: https://twitter.com/polysigninc - type: LinkedIn url: https://www.linkedin.com/company/polysign - type: Authentication url: authentication/polysign-authentication.yml - type: OAuthScopes url: scopes/polysign-scopes.yml - type: Conventions url: conventions/polysign-conventions.yml - type: ErrorCatalog url: errors/polysign-problem-types.yml - type: Lifecycle url: lifecycle/polysign-lifecycle.yml - type: DataModel url: data-model/polysign-data-model.yml - type: Conformance url: conformance/polysign-conformance.yml - type: DomainSecurity url: security/polysign-domain-security.yml - type: Packages url: packages/polysign-packages.yml - type: LLMsTxt url: llms/polysign-llms.txt - type: AgentSkill url: skills/_index.yml - type: Sandbox url: sandbox/polysign-sandbox.yml x-enrichment: date: '2026-08-02' status: enriched artifacts_added: 24 pass: local-v1