Dropbox Sign
Dropbox Sign (formerly HelloSign) is an eSignature platform that lets developers and businesses embed legally binding electronic signature workflows into their applications and websites. The product supports embedded signing and requesting, reusable templates, custom signer fields, branded signing flows, audit trails, and tamper-proof document delivery. The Dropbox Sign API is documented with an official OpenAPI specification and authenticated via HTTP Basic Auth with an API key or OAuth 2.0 Bearer tokens.
Limited machine-readable signal and partial portal coverage — documentation a human can read, but little a machine or agent can consume without scraping.
API Evangelist profiles Dropbox Sign the way a machine reads it — 15 machine-readable artifacts across 6 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Dropbox Sign scores 37.4/100 (thin), with a separate agent-readiness read of 47/100 (agent ready). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
How we profile Dropbox Sign
Each block below is one kind of artifact we hold for Dropbox Sign. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 6
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
Dropbox Sign Events and Callbacks API
Outbound event / callback surface for Dropbox Sign. The platform POSTs JSON event payloads (wrapped in a `multipart/form-data` `json` field) to a subscriber-configured URL whene...
Dropbox Sign Account API
The Account API from Dropbox Sign — 3 operation(s) for account.
Dropbox Sign API App API
The API App API from Dropbox Sign — 3 operation(s) for api app.
Dropbox Sign Bulk Send Job API
The Bulk Send Job API from Dropbox Sign — 2 operation(s) for bulk send job.
Dropbox Sign Embedded API
The Embedded API from Dropbox Sign — 2 operation(s) for embedded.
Dropbox Sign Fax API
The Fax API from Dropbox Sign — 2 operation(s) for fax.
Open Collections 1
Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
Dropbox Sign API
OPEN COLLECTIONGraphQL 1
Where a provider ships GraphQL, the schema is the contract. We profile it alongside the REST surface so the whole interface is legible in one place.
GraphQL schemas published by this provider.
Dropbox Sign (HelloSign) GraphQL Schema
This conceptual GraphQL schema represents the Dropbox Sign (formerly HelloSign) eSignature REST API v3. Dropbox Sign provides legally binding electronic signature workflows incl...
GRAPHQLEvent Specifications 1
Not every API is request/response. AsyncAPI describes the event-driven and streaming side — the webhooks and channels — so the asynchronous half of the interface is documented the same way the synchronous half is.
AsyncAPI definitions for this provider's event-driven and streaming APIs.
Dropbox Sign Events and Callbacks
AsyncAPI description of the Dropbox Sign (formerly HelloSign) outbound event / callback surface. Dropbox Sign delivers event notifications by issuing HTTP POST requests to a sub...
ASYNCAPISpectral Rules 1
Governance rulesets we run against this provider's specs — the automated checks behind parts of the score. Profiling them makes the quality bar explicit and re-runnable, not a matter of opinion.
Dropbox Sign API Rules
SPECTRALSecurity Posture 3
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Dropbox Sign Trust Center
SOC 2, ISO 27001, ISO 27017, ISO 27018, PCI DSS, HIPAA, GDPR, CSA STAR
SECURITYScopes 1
OAuth scopes are the vocabulary of least-privilege access. Profiling them shows exactly what an integration — or an agent acting on a user's behalf — is allowed to do.
OAuth scopes governing access to this provider's APIs.
Agentic Access 1
An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.
Recommended x-agentic-access execution contracts for AI agents.
Resources
Every other property we hold for Dropbox Sign — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 1
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 2
MCP servers, agent skills, and machine-readable catalogs
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 4
Authentication, authorization, and security posture
Commercial 1
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API
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