Firma.dev
Firma.dev provides a low‑cost electronic signature API aimed at developers, offering pay‑as‑you‑go pricing starting at €0.049 per envelope with no minimums or contracts. The platform is fully white‑labeled, compliant with ESIGN, UETA, eIDAS, and includes audit trails, SOC 2, GDPR, ISO 27001 certifications. It offers a simple REST API, Swagger/OpenAPI docs, webhook events, and sample apps, targeting quick integration for any language. Firma.dev also supplies a developer portal, pricing page, and extensive documentation for embedding e‑signatures directly into applications.
Solid contracts, transparent operations, and an easy start — typically complete on four or five facets with one clear soft spot.
API Evangelist profiles Firma.dev the way a machine reads it — 78 machine-readable artifacts across 1 API, 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 — Firma.dev scores 60.5/100 (strong), with a separate agent-readiness read of 37/100 (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. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-10-03 · rubric v0.23.0
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How we profile Firma.dev
Each block below is one kind of artifact we hold for Firma.dev. 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 12
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.
Firma.dev Company API
Company information and settings
Firma.dev Custom Fields API
Custom field definition management for workspaces, templates, and signing requests
Firma.dev Email Domains API
Email domain setup and verification for sending signing request emails from custom domains
Firma.dev Email Templates API
Email template management for workspace and company-level customization of signing request notifications
Firma.dev JWT Management API
JWT token generation and revocation for embedded templates
Firma.dev Organization Seals API
Organization seal management: create, update, revoke, and erase seals applied to signing requests
Firma.dev Signer Terms API
Custom signer terms-of-service / consent statements, company-level with per-language workspace overrides
Firma.dev Signing Requests API
Document signing request operations
Firma.dev Templates API
Template management operations
Firma.dev Webhooks API
Webhook configuration and management
Firma.dev Workspace Settings API
Workspace configuration and settings
Firma.dev Workspaces API
Workspace management operations
Scroll within the panel for all 12 ·
MCP Servers 1
Model Context Protocol servers expose these APIs directly to AI agents. We profile them because agent-native access is the fastest-growing way this provider's capabilities actually get used.
Model Context Protocol servers that expose these APIs to AI agents.
Firma.dev MCP Server
MCP SERVERPricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the things the Kin Score reads for access clarity — renamed from commercial clarity in rubric 0.12, because a free statutory interface has access terms and no commercial ones.
Published pricing tiers and plan structures.
Semantic Vocabularies 1
JSON-LD contexts give the data shared meaning across APIs. We profile them because semantics are what let a machine reconcile 'customer' here with 'customer' somewhere else.
JSON-LD contexts and semantic vocabularies used across these APIs.
Firma Dev Context
JSON-LDSpectral 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.
Firma.dev API Rules
SPECTRALJSON Schema 58
Standalone JSON Schema definitions describe the data models behind the API. We profile them so the shapes are validatable on their own — useful long after a single request is forgotten.
Standalone JSON Schema definitions for this provider's data models.
AnchorTag
JSON SCHEMAApiKeyExpireResponse
JSON SCHEMAApiKeyRegenerateResponse
JSON SCHEMACompanyEmailTemplateListResponse
JSON SCHEMACompany
JSON SCHEMACompanySettings
JSON SCHEMAConditionSet
JSON SCHEMACustomFieldListResponse
JSON SCHEMADomainCreateResponse
JSON SCHEMADomainFinalizeResponse
JSON SCHEMADomainListResponse
JSON SCHEMADomain
JSON SCHEMADomainVerifyDnsResponse
JSON SCHEMADomainVerifyOwnershipResponse
JSON SCHEMAEmailTemplateDefaultsResponse
JSON SCHEMAEmailTemplateDeleteResponse
JSON SCHEMAEmailTemplatePlaceholdersResponse
JSON SCHEMAEmailTemplate
JSON SCHEMAField
JSON SCHEMAGenerateJWTRequest
JSON SCHEMAGenerateSigningRequestJWTRequest
JSON SCHEMAGenerateSigningRequestJWTResponse
JSON SCHEMAGenerateTemplateTokenResponse
JSON SCHEMALogoDeleteResponse
JSON SCHEMALogoUploadResponse
JSON SCHEMAMessageResponse
JSON SCHEMAOrganizationSealCreate
JSON SCHEMAOrganizationSeal
JSON SCHEMARecipient
JSON SCHEMAReminder
JSON SCHEMARevokeJWTResponse
JSON SCHEMARevokeSigningRequestJWTResponse
JSON SCHEMARotateSecretResponse
JSON SCHEMASealAccessLogEntry
JSON SCHEMASealApplication
JSON SCHEMASealImage
JSON SCHEMASealStatement
JSON SCHEMASecretStatusResponse
JSON SCHEMASignerTermsDeleteResponse
JSON SCHEMASignerTermsListResponse
JSON SCHEMASignerTermsUpdateResponse
JSON SCHEMASigningRequestCustomField
JSON SCHEMASigningRequestDetail
JSON SCHEMASigningRequestSettings
JSON SCHEMASigningRequestUpdateResponse
JSON SCHEMATemplateCopyResponse
JSON SCHEMATemplateCustomField
JSON SCHEMATemplateDuplicateResponse
JSON SCHEMATemplatePatchResponse
JSON SCHEMATemplate
JSON SCHEMATestWebhookResponse
JSON SCHEMAWebhookListResponse
JSON SCHEMAWebhook
JSON SCHEMAWorkspaceCustomField
JSON SCHEMAWorkspaceEmailTemplateListResponse
JSON SCHEMAWorkspaceListResponse
JSON SCHEMAWorkspace
JSON SCHEMAWorkspaceSettings
JSON SCHEMAScroll within the panel for all 58 ·
Security 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.
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 Firma.dev — 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 2
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 4
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 6
Pagination, idempotency, versioning, errors, and events
Build 2
SDKs, sample code, and the tooling you integrate with
Access & Security 5
Authentication, authorization, and security posture
Operate 2
Status, limits, changes, and where to get help
Commercial 4
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API
Other 3
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/firma-dev · machine-readable index on apis.io
This is an independent, third-party profile of Firma.dev, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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