SignOps

SignOps provides an API that delivers email OTP codes, push notifications, login approvals, passkey sign‑ins, and authenticator TOTP codes. The service is aimed at developers integrating authentication into applications and works with platforms such as Supabase, Firebase, Auth0, Cognito, React Native, Flutter, and Node.js. Pricing starts with a free tier and a paid plan at $6.99 per month.

SignOps publishes 16 API contracts indexed on the APIs.io network, including Approve API, Approve SDK API, Authenticator API, and 13 more. Tagged areas include Authentication, OTP, Push Notifications, and Passkeys.

The SignOps catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

SignOps’ developer surface includes signup flow, getting-started guide, authentication, documentation, pricing, engineering blog, and 30 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

54.0/100 developing Agent 36/100 agent ready Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract 1 MCP Servers 4 Agent Skills

Authentication OTP Push Notifications Passkeys

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 54.0/100 · developing

Contract Quality 11.9 / 21

Developer Ergonomics 10.0 / 17

Access Clarity 10.5 / 17

Operational Transparency 3.7 / 11

Contract Governance 2.2 / 10

Discoverability 5.7 / 9

Regulatory Posture 4.6 / 15

Agent readiness — 36/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 0 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link Ask about this →
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented) Ask about this →
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks Ask about this →
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too Ask about this →

6 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 55.9 — up to +11.0 composite points Ask about this →
Contract Governance scores 22.0 — up to +9.4 composite points Ask about this →
Operational Transparency scores 33.3 — up to +8.7 composite points Ask about this →

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/signops/apis.yml: open an issue on github.com/api-evangelist/signops to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

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.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

OpenAPI

measured — observed by APIs.io (published)

APIs 16

Individual APIs this provider publishes, each with its own machine-readable definition.

SignOps API

Push notifications, login approval, passkeys, authenticator codes and email OTP on one REST API.

SignOps Approve API

The Approve API from SignOps — 5 operation(s) for approve.

SignOps Approve SDK API

The Approve SDK API from SignOps — 4 operation(s) for approve sdk.

SignOps Authenticator API

The Authenticator API from SignOps — 6 operation(s) for authenticator.

SignOps Devices API

The Devices API from SignOps — 4 operation(s) for devices.

SignOps Email OTP API

The Email OTP API from SignOps — 6 operation(s) for email otp.

SignOps Inbox API

The Inbox API from SignOps — 7 operation(s) for inbox.

SignOps Live Activities API

The Live Activities API from SignOps — 5 operation(s) for live activities.

SignOps Passkeys API

The Passkeys API from SignOps — 5 operation(s) for passkeys.

SignOps Passkeys browser API

The Passkeys browser API from SignOps — 4 operation(s) for passkeys browser.

SignOps Push API

The Push API from SignOps — 3 operation(s) for push.

SignOps Status API

The Status API from SignOps — 1 operation(s) for status.

SignOps Templates API

The Templates API from SignOps — 2 operation(s) for templates.

SignOps Topics API

The Topics API from SignOps — 3 operation(s) for topics.

SignOps Users and DPDP API

The Users and DPDP API from SignOps — 3 operation(s) for users and dpdp.

SignOps Verify API

The Verify API from SignOps — 5 operation(s) for verify.

Scroll for all 16

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

SignOps MCP Server

Remote MCP server at api.signops.dev.

MCP SERVER

Agent Skills 4

Packaged agent skills for driving this provider's APIs from an AI assistant.

signops-approve-flow

AGENT SKILL

signops-manage-topic-subscription

AGENT SKILL

signops-manage-user-consent

AGENT SKILL

signops-read-inbox-messages

AGENT SKILL

SignOps API pricing

Prices published by SignOps.

Plan	Price
Free	$0/month
Starter	$6.99/month + usage
Pro	$20.99/month + usage

Plan details, limits and sources →

Rate limits

Supabase built‑in email sender: 2 an hour

Rate-limit details →

Pricing Plans 1

Published pricing tiers and plan structures.

SignOps Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

SignOps Rate Limits

1 limits

RATE LIMITS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Signops Context

12 classes · 52 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

SignOps API Rules

59 rules · 53 error-severity 5 warn-severity 1 info-severity

SPECTRAL

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

SignOps Authentication

http · 1 scheme

SECURITY

SignOps Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

SignOps Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access (API Evangelist recommendations) 1

Recommended x-agentic-access execution contracts for AI agents.

SignOps Agentic Access

72 operations · 50 acting · 1 human-in-the-loop

72 operations · 50 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

SignUp

SignUp

GettingStarted

GettingStarted

DeveloperPortal

DeveloperPortal

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgentSkill

LLMsTxt

MCPServer

WellKnown

Design & Contract 8

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

Idempotency

Conventions

ErrorCatalog

Conformance

Scroll for all 8

Build 5

SDKs, sample code, and the tooling you integrate with

ToolCrosswalk

ToolCrosswalk

SDKs

SDKs

Packages

Packages

GitHubOrganization

GitHubOrganization

Postman

Postman

Access & Security 5

Authentication, authorization, and security posture

SecurityTxt

SecurityTxt

Security

Security

Authentication

Authentication

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: signops
name: SignOps
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  generated: '2026-11-13'
  method: derived
image: https://signops.dev/og.png
description: SignOps provides an API that delivers email OTP codes, push notifications, login approvals, passkey sign‑ins,
  and authenticator TOTP codes. The service is aimed at developers integrating authentication into applications and works
  with platforms such as Supabase, Firebase, Auth0, Cognito, React Native, Flutter, and Node.js. Pricing starts with a free
  tier and a paid plan at $6.99 per month.
url: https://artifacts.apis.io/signops/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-08 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-08'
modified: '2026-11-08'
tags:
- Authentication
- OTP
- Push Notifications
- Passkeys
tags_raw:
- Authentication
- OTP
- PushNotifications
- Passkeys
- API
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/signops-agentic-access.yml
- type: RateLimits
  url: rate-limits/signops-rate-limits.yml
- type: Plans
  url: plans/signops-plans-pricing.yml
- type: Spectral
  url: rules/signops-rules.yml
- type: JSONLD
  url: json-ld/signops-context.jsonld
- type: Vocabulary
  url: vocabulary/signops-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/signops-data-model.yml
- type: Idempotency
  url: conventions/signops-conventions.yml
- type: Conventions
  url: conventions/signops-conventions.yml
- type: ErrorCatalog
  url: errors/signops-problem-types.yml
- type: Conformance
  url: conformance/signops-conformance.yml
- type: LLMsTxt
  url: llms/signops-llms.txt
- type: ToolCrosswalk
  url: mcp/signops-tool-crosswalk.yml
- type: MCPServer
  url: mcp/signops-mcp.yml
- type: SecurityTxt
  url: well-known/signops-security.txt
- type: WellKnown
  url: well-known/signops-well-known.yml
- type: Hosts
  url: hosts/signops-hosts.yml
- type: Vendors
  url: vendors/signops-vendors.yml
- type: SDKs
  url: packages/signops-packages.yml
- type: Packages
  url: packages/signops-packages.yml
- type: SignUp
  url: https://app.signops.dev/signup
- type: Security
  url: https://signops.dev/security/
- type: GettingStarted
  url: https://signops.dev/otp-service-provider-india/
- type: DeveloperPortal
  url: https://api.signops.dev</code
- type: Authentication
  url: authentication/signops-authentication.yml
- type: VulnerabilityDisclosure
  url: security/signops-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/signops-domain-security.yml
- type: Website
  url: https://signops.dev
- type: Documentation
  url: https://signops.dev/docs/
- type: Pricing
  url: https://signops.dev/pricing/
- type: Blog
  url: https://signops.dev/blog/
- type: GitHubOrganization
  url: https://github.com/signops-dev
- type: Postman
  url: https://www.postman.com/signops/signops-api
- type: TermsOfService
  url: https://signops.dev/terms/
- type: PrivacyPolicy
  url: https://signops.dev/privacy/
apis:
- name: SignOps API
  description: Push notifications, login approval, passkeys, authenticator codes and email OTP on one REST API.
  humanURL: https://signops.dev/docs/
  baseURL: https://api.signops.dev
  openAPI:
    url: openapi/signops-openapi.json
    type: OpenAPI
  aid: signops:signops-api
- aid: signops:signops-approve-api
  name: SignOps Approve API
  description: The Approve API from SignOps — 5 operation(s) for approve.
  humanURL: https://signops.dev/docs/
  baseURL: https://api.signops.dev
  tags:
  - Approve
  properties:
  - type: OpenAPI
    url: openapi/signops-approve-api-openapi.yml
- aid: signops:signops-approve-sdk-api
  name: SignOps Approve SDK API
  description: The Approve SDK API from SignOps — 4 operation(s) for approve sdk.
  humanURL: https://signops.dev/docs/
  baseURL: https://api.signops.dev
  tags:
  - Approve SDK
  properties:
  - type: OpenAPI
    url: openapi/signops-approve-sdk-api-openapi.yml
- aid: signops:signops-authenticator-api
  name: SignOps Authenticator API
  description: The Authenticator API from SignOps — 6 operation(s) for authenticator.
  humanURL: https://signops.dev/docs/
  baseURL: https://api.signops.dev
  tags:
  - Authenticator
  properties:
  - type: OpenAPI
    url: openapi/signops-authenticator-api-openapi.yml
- aid: signops:signops-devices-api
  name: SignOps Devices API
  description: The Devices API from SignOps — 4 operation(s) for devices.
  humanURL: https://signops.dev/docs/
  baseURL: https://api.signops.dev
  tags:
  - Devices
  properties:
  - type: OpenAPI
    url: openapi/signops-devices-api-openapi.yml
- aid: signops:signops-email-otp-api
  name: SignOps Email OTP API
  description: The Email OTP API from SignOps — 6 operation(s) for email otp.
  humanURL: https://signops.dev/docs/
  baseURL: https://api.signops.dev
  tags:
  - Email OTP
  properties:
  - type: OpenAPI
    url: openapi/signops-email-otp-api-openapi.yml
- aid: signops:signops-inbox-api
  name: SignOps Inbox API
  description: The Inbox API from SignOps — 7 operation(s) for inbox.
  humanURL: https://signops.dev/docs/
  baseURL: https://api.signops.dev
  tags:
  - Inbox
  properties:
  - type: OpenAPI
    url: openapi/signops-inbox-api-openapi.yml
- aid: signops:signops-live-activities-api
  name: SignOps Live Activities API
  description: The Live Activities API from SignOps — 5 operation(s) for live activities.
  humanURL: https://signops.dev/docs/
  baseURL: https://api.signops.dev
  tags:
  - Live Activities
  properties:
  - type: OpenAPI
    url: openapi/signops-live-activities-api-openapi.yml
- aid: signops:signops-passkeys-api
  name: SignOps Passkeys API
  description: The Passkeys API from SignOps — 5 operation(s) for passkeys.
  humanURL: https://signops.dev/docs/
  baseURL: https://api.signops.dev
  tags:
  - Passkeys
  properties:
  - type: OpenAPI
    url: openapi/signops-passkeys-api-openapi.yml
- aid: signops:signops-passkeys-browser-api
  name: SignOps Passkeys browser API
  description: The Passkeys browser API from SignOps — 4 operation(s) for passkeys browser.
  humanURL: https://signops.dev/docs/
  baseURL: https://api.signops.dev
  tags:
  - Passkeys browser
  properties:
  - type: OpenAPI
    url: openapi/signops-passkeys-browser-api-openapi.yml
- aid: signops:signops-push-api
  name: SignOps Push API
  description: The Push API from SignOps — 3 operation(s) for push.
  humanURL: https://signops.dev/docs/
  baseURL: https://api.signops.dev
  tags:
  - Push
  properties:
  - type: OpenAPI
    url: openapi/signops-push-api-openapi.yml
- aid: signops:signops-status-api
  name: SignOps Status API
  description: The Status API from SignOps — 1 operation(s) for status.
  humanURL: https://signops.dev/docs/
  baseURL: https://api.signops.dev
  tags:
  - Status
  properties:
  - type: OpenAPI
    url: openapi/signops-status-api-openapi.yml
- aid: signops:signops-templates-api
  name: SignOps Templates API
  description: The Templates API from SignOps — 2 operation(s) for templates.
  humanURL: https://signops.dev/docs/
  baseURL: https://api.signops.dev
  tags:
  - Templates
  properties:
  - type: OpenAPI
    url: openapi/signops-templates-api-openapi.yml
- aid: signops:signops-topics-api
  name: SignOps Topics API
  description: The Topics API from SignOps — 3 operation(s) for topics.
  humanURL: https://signops.dev/docs/
  baseURL: https://api.signops.dev
  tags:
  - Topic
  tags_raw:
  - Topics
  properties:
  - type: OpenAPI
    url: openapi/signops-topics-api-openapi.yml
- aid: signops:signops-users-and-dpdp-api
  name: SignOps Users and DPDP API
  description: The Users and DPDP API from SignOps — 3 operation(s) for users and dpdp.
  humanURL: https://signops.dev/docs/
  baseURL: https://api.signops.dev
  tags:
  - Users and DPDP
  properties:
  - type: OpenAPI
    url: openapi/signops-users-and-dpdp-api-openapi.yml
- aid: signops:signops-verify-api
  name: SignOps Verify API
  description: The Verify API from SignOps — 5 operation(s) for verify.
  humanURL: https://signops.dev/docs/
  baseURL: https://api.signops.dev
  tags:
  - Verify
  properties:
  - type: OpenAPI
    url: openapi/signops-verify-api-openapi.yml
x-submission-notes: ' Push notifications (Android, iOS, web), login approval by push, passkeys, authenticator codes and email
  OTP on one REST API. OpenAPI: https://signops.dev/openapi.json. llms.txt: https://signops.dev/llms.txt. Remote MCP server:
  https://api.signops.dev/mcp (official MCP Registry name dev.signops/sign'
x-submission-probe: 2026-11-07 root 200, ctl 404
x-enrichment:
  date: '2026-11-08'
  status: enriched
  artifacts_added: 32
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

SignOps API — frequently asked questions

Does SignOps have an API?

Yes. APIs.io lists 16 APIs from SignOps, including SignOps API, SignOps Approve API and SignOps Approve SDK API, and 13 more.

Is there an OpenAPI specification for the SignOps API?

Yes. APIs.io indexes 15 OpenAPI specifications for SignOps, each linked for download from this page.

How do I authenticate with the SignOps API?

SignOps uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as SignOps Authentication.

How much does the SignOps API cost?

SignOps publishes its prices; its Free plan is $0/month as of 2026-11-08. APIs.io lists 3 pricing plans for SignOps, with each plan's price, limits and inclusions under Pricing on this page.

Does SignOps have an MCP server?

Yes. APIs.io lists 1 MCP server for SignOps: Remote MCP server at api.signops.dev.

Is the SignOps API ready for AI agents?

SignOps has a Kin Score of 54.0 out of 100 (developing) and an Agent Readiness score of 36.4 (agent-ready), scored by API Evangelist on 2026-11-13.

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