Firma.dev
Firma.dev provides an electronic signature API for developers, with pay-as-you-go pricing starting at €0.049 per envelope and no minimums or contracts. It offers embeddable signing with custom branding - template and signing-request editors and the signing experience embed in the customer's own product, with isolated customer workspaces. It is built for ESIGN, UETA and eIDAS with audit trails, supports SOC 2 and ISO/IEC 27001, and addresses GDPR. It offers a REST API described in OpenAPI, webhook events, and sample apps for embedding e-signatures directly into applications.
Firma.dev publishes 12 API contracts indexed on the APIs.io network, including Company API, Custom Fields API, Email Domains API, and 9 more. Tagged areas include Company, E-Signature, Developer Tools, and LowCost.
The Firma.dev catalog on APIs.io includes 1 event-driven AsyncAPI specification, 1 JSON-LD context, and 1 Spectral governance ruleset.
Firma.dev’s developer surface includes authentication, documentation, API reference, getting-started guide, pricing, signup flow, support, and 31 more developer resources.
What this lets a business do 3
Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →
Kin Score
Markets this provider is in provisional
The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.
| Market | Position | Depth | Registered MCP server | Declares compatibility |
|---|---|---|---|---|
| Bubble Plugin Marketplace (official vendor plugins on Bubble) | builds-on | 19.7 (thin) | - | 1 |
Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.
Standards implemented 2
Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.
APIs 12
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 for all 12
MCP Servers 1
Model Context Protocol servers that expose these APIs to AI agents.
Agent Skills 3
Packaged agent skills for driving this provider's APIs from an AI assistant.
firma-dev-create-and-test-webhook
AGENT SKILLfirma-dev-create-workspace-with-logo
AGENT SKILLFirma.dev API pricing
Prices published by Firma.dev, read 2026-09-25 from firma.dev/pricing.
| Plan | Price |
|---|---|
| Pay per envelope | €0.049 per envelope |
| Priority Support | €100/Month |
Pricing Plans 2
Published pricing tiers and plan structures.
Service Levels 1
Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.
Firma.dev
SLAFinOps 1
Cost, billing, and metering signals for API financial operations.
Firma Dev Finops
FINOPSEvent Specifications 1
AsyncAPI definitions for this provider's event-driven and streaming APIs.
Firma Dev Webhooks
ASYNCAPISemantic Vocabularies 1
JSON-LD contexts and semantic vocabularies used across these APIs.
Firma Dev Context
JSON-LDSpectral Rules 1
Spectral governance rulesets for linting and validating these APIs.
Firma.dev API Rules
SPECTRALJSON Schema 58
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 for all 58
Security Posture 3
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Get Started 2
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 5
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 9
Pagination, idempotency, versioning, errors, and events
Scroll for all 9
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 4
Properties that don't map to a standard resource type
Source (apis.yml)
Firma.dev API — frequently asked questions
Does Firma.dev have an API?
Yes. APIs.io lists 12 APIs from Firma.dev, including Firma.dev Company API, Firma.dev Custom Fields API and Firma.dev Email Domains API, and 9 more.
Is there an OpenAPI specification for the Firma.dev API?
Yes. APIs.io indexes 12 OpenAPI specifications for Firma.dev, each linked for download from this page.
How do I authenticate with the Firma.dev API?
Firma.dev uses bearer-token authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Firma Dev Authentication.
How much does the Firma.dev API cost?
Firma.dev publishes its prices; its Pay per envelope plan is €0.049 per envelope as of 2026-09-25. APIs.io lists 2 pricing plans for Firma.dev, with each plan's price, limits and inclusions under Pricing on this page.
Does Firma.dev have an MCP server?
Yes. APIs.io lists 1 MCP server for Firma.dev: Remote MCP server at docs.firma.dev; 3 tools listed.
Is the Firma.dev API ready for AI agents?
Firma.dev has a Kin Score of 52.0 out of 100 (developing) and an Agent Readiness score of 43.1 (agent-ready), scored by API Evangelist on 2026-11-06.
Work with this as data
Every provider here is available over the APIs.io API and to AI agents over MCP.