Cold Leads

Cold Leads provides a simple CRM platform for small businesses, turning website visitors and cold contacts into paying clients. It aggregates enquiries from websites into a single place, offers verified B2B lists, enables personal email campaigns from the user’s own mailbox, and supports multilingual communication in Czech, Ukrainian, German, Spanish, and English. Pricing starts at $19 per month with a cancel‑anytime policy, making it accessible for startups and growing teams.

Cold Leads publishes 8 API contracts indexed on the APIs.io network, including Activity API, Credits API, Find API, and 5 more. Tagged areas include CRM, Software-as-a-Service, Small Business, Lead Management, and Cold Leads.

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

Cold Leads’ developer surface includes support, pricing, getting-started guide, engineering blog, API reference, authentication, and 24 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

51.2/100 developing Agent 39/100 agent ready Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 published contract 1 MCP Servers 1 Agent Skills

CRM Software-as-a-Service Small Business Lead ManagementCold Leads

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 51.2/100 · developing

Contract Quality 11.8 / 21

Developer Ergonomics 8.0 / 17

Access Clarity 10.3 / 17

Operational Transparency 1.2 / 11

Contract Governance 3.6 / 10

Discoverability 6.1 / 9

Regulatory Posture 5.3 / 15

Agent readiness — 39/100 · 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 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 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 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 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):

Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too

5 more unmet checks in the Agent Readiness table above.

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

Operational Transparency scores 10.5 — up to +11.6 composite points
Contract Quality scores 55.6 — up to +11.1 composite points
Developer Ergonomics scores 47.0 — up to +10.6 composite points

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.

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/coldleads-app/apis.yml: open an issue on github.com/api-evangelist/coldleads-app 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 4

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)

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Dynamic Client Registration

measured — observed by APIs.io (published)

OpenAPI

measured — observed by APIs.io (published)

APIs 8

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

Cold Leads Activity API

The Activity API from Cold Leads — 1 operation(s) for activity.

Cold Leads Credits API

The Credits API from Cold Leads — 1 operation(s) for credits.

Cold Leads Find API

The Find API from Cold Leads — 1 operation(s) for find.

Cold Leads Follow Ups API

The Follow Ups API from Cold Leads — 1 operation(s) for follow ups.

Cold Leads Leads API

The Leads API from Cold Leads — 2 operation(s) for leads.

Cold Leads Next Actions API

The Next Actions API from Cold Leads — 1 operation(s) for next actions.

Cold Leads Social API

The Social API from Cold Leads — 5 operation(s) for social.

Cold Leads Verify API

The Verify API from Cold Leads — 3 operation(s) for verify.

Scroll for all 8

MCP Servers 1

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

Cold Leads MCP Server

Remote MCP server at coldleads.app requiring OAuth.

MCP SERVER

Agent Skills 1

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

coldleads-app-verify-email-list

AGENT SKILL

Semantic Vocabularies 1

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

Coldleads App Context

3 classes · 29 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Cold Leads API Rules

44 rules · 42 errors 1 warnings 1 info

SPECTRAL

JSON Schema 3

Standalone JSON Schema definitions for this provider's data models.

LeadContext

5 properties

JSON SCHEMA

NextAction

15 properties

JSON SCHEMA

VerifyResult

10 properties

JSON SCHEMA

Security Posture 4

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

Coldleads App Authentication

apiKey · 1 scheme

SECURITY

Coldleads App Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Coldleads App Vulnerability Disclosure

security.txt · contact published

SECURITY

Coldleads App Trust Center

PCI DSS, GDPR

SECURITY

Agentic Access 1

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

Coldleads App Agentic Access

15 operations · 5 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Login

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgentSkill

LLMsTxt

MCPServer

WellKnown

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

ErrorCatalog

Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

SDKs

SDKs

Access & Security 7

Authentication, authorization, and security posture

Compliance

SecurityTxt

Security

Authentication

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Scroll for all 7

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Pricing

Pricing

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: coldleads-app
name: Cold Leads
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://coldleads.app/og?p=%2F&l=en&v=2
description: Cold Leads provides a simple CRM platform for small businesses, turning website visitors and cold contacts into
  paying clients. It aggregates enquiries from websites into a single place, offers verified B2B lists, enables personal email
  campaigns from the user’s own mailbox, and supports multilingual communication in Czech, Ukrainian, German, Spanish, and
  English. Pricing starts at $19 per month with a cancel‑anytime policy, making it accessible for startups and growing teams.
url: https://coldleads.app
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-04 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-04'
modified: '2026-11-04'
tags:
- CRM
- Software-as-a-Service
- Small Business
- Lead Management
- Cold Leads
tags_raw:
- CRM
- SaaS
- Small Business
- Lead Management
- Cold Leads
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/coldleads-app-agentic-access.yml
- type: Spectral
  url: rules/coldleads-app-rules.yml
- type: JSONLD
  url: json-ld/coldleads-app-context.jsonld
- type: Vocabulary
  url: vocabulary/coldleads-app-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/coldleads-app-data-model.yml
- type: Compliance
  url: https://coldleads.app/security
- type: ErrorCatalog
  url: errors/coldleads-app-problem-types.yml
- type: Conformance
  url: conformance/coldleads-app-conformance.yml
- type: LLMsTxt
  url: llms/coldleads-app-llms.txt
- type: MCPServer
  url: mcp/coldleads-app-mcp.yml
- type: SecurityTxt
  url: well-known/coldleads-app-security.txt
- type: WellKnown
  url: well-known/coldleads-app-well-known.yml
- type: Hosts
  url: hosts/coldleads-app-hosts.yml
- type: Vendors
  url: vendors/coldleads-app-vendors.yml
- type: TermsOfService
  url: https://coldleads.app/terms
- type: Support
  url: https://coldleads.app/help
- type: Security
  url: https://coldleads.app/security
- type: SDKs
  url: https://www.npmjs.com/package/@coldleads/sdk
- type: PrivacyPolicy
  url: https://coldleads.app/privacy
- type: Pricing
  url: https://coldleads.app/help/plans-and-billing
- type: Login
  url: https://coldleads.app/login
- type: GettingStarted
  url: https://coldleads.app/help/getting-started
- type: Blog
  url: https://blog.coldleads.app/
- type: APIReference
  url: https://coldleads.app/developers
- type: Authentication
  url: authentication/coldleads-app-authentication.yml
- type: TrustCenter
  url: security/coldleads-app-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/coldleads-app-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/coldleads-app-domain-security.yml
- type: Website
  url: https://coldleads.app/
apis:
- aid: coldleads-app:coldleads-app-activity-api
  name: Cold Leads Activity API
  description: The Activity API from Cold Leads — 1 operation(s) for activity.
  humanURL: https://coldleads.app/developers
  baseURL: https://coldleads.app/api/v1
  tags:
  - Activity
  properties:
  - type: OpenAPI
    url: openapi/coldleads-app-activity-api-openapi.yml
  - type: JSONSchema
    url: json-schema/coldleads-app-lead-context-schema.json
  - type: JSONSchema
    url: json-schema/coldleads-app-next-action-schema.json
  - type: JSONSchema
    url: json-schema/coldleads-app-verify-result-schema.json
- aid: coldleads-app:coldleads-app-credits-api
  name: Cold Leads Credits API
  description: The Credits API from Cold Leads — 1 operation(s) for credits.
  humanURL: https://coldleads.app/developers
  baseURL: https://coldleads.app/api/v1
  tags:
  - Credit
  tags_raw:
  - Credits
  properties:
  - type: OpenAPI
    url: openapi/coldleads-app-credits-api-openapi.yml
  - type: JSONSchema
    url: json-schema/coldleads-app-lead-context-schema.json
  - type: JSONSchema
    url: json-schema/coldleads-app-next-action-schema.json
  - type: JSONSchema
    url: json-schema/coldleads-app-verify-result-schema.json
- aid: coldleads-app:coldleads-app-find-api
  name: Cold Leads Find API
  description: The Find API from Cold Leads — 1 operation(s) for find.
  humanURL: https://coldleads.app/developers
  baseURL: https://coldleads.app/api/v1
  tags:
  - Find
  properties:
  - type: OpenAPI
    url: openapi/coldleads-app-find-api-openapi.yml
  - type: JSONSchema
    url: json-schema/coldleads-app-lead-context-schema.json
  - type: JSONSchema
    url: json-schema/coldleads-app-next-action-schema.json
  - type: JSONSchema
    url: json-schema/coldleads-app-verify-result-schema.json
- aid: coldleads-app:coldleads-app-follow-ups-api
  name: Cold Leads Follow Ups API
  description: The Follow Ups API from Cold Leads — 1 operation(s) for follow ups.
  humanURL: https://coldleads.app/developers
  baseURL: https://coldleads.app/api/v1
  tags:
  - Follow-ups
  tags_raw:
  - Follow Ups
  properties:
  - type: OpenAPI
    url: openapi/coldleads-app-follow-ups-api-openapi.yml
  - type: JSONSchema
    url: json-schema/coldleads-app-lead-context-schema.json
  - type: JSONSchema
    url: json-schema/coldleads-app-next-action-schema.json
  - type: JSONSchema
    url: json-schema/coldleads-app-verify-result-schema.json
- aid: coldleads-app:coldleads-app-leads-api
  name: Cold Leads Leads API
  description: The Leads API from Cold Leads — 2 operation(s) for leads.
  humanURL: https://coldleads.app/developers
  baseURL: https://coldleads.app/api/v1
  tags:
  - Leads
  properties:
  - type: OpenAPI
    url: openapi/coldleads-app-leads-api-openapi.yml
  - type: JSONSchema
    url: json-schema/coldleads-app-lead-context-schema.json
  - type: JSONSchema
    url: json-schema/coldleads-app-next-action-schema.json
  - type: JSONSchema
    url: json-schema/coldleads-app-verify-result-schema.json
- aid: coldleads-app:coldleads-app-next-actions-api
  name: Cold Leads Next Actions API
  description: The Next Actions API from Cold Leads — 1 operation(s) for next actions.
  humanURL: https://coldleads.app/developers
  baseURL: https://coldleads.app/api/v1
  tags:
  - Next Actions
  properties:
  - type: OpenAPI
    url: openapi/coldleads-app-next-actions-api-openapi.yml
  - type: JSONSchema
    url: json-schema/coldleads-app-lead-context-schema.json
  - type: JSONSchema
    url: json-schema/coldleads-app-next-action-schema.json
  - type: JSONSchema
    url: json-schema/coldleads-app-verify-result-schema.json
- aid: coldleads-app:coldleads-app-social-api
  name: Cold Leads Social API
  description: The Social API from Cold Leads — 5 operation(s) for social.
  humanURL: https://coldleads.app/developers
  baseURL: https://coldleads.app/api/v1
  tags:
  - Social
  properties:
  - type: OpenAPI
    url: openapi/coldleads-app-social-api-openapi.yml
  - type: JSONSchema
    url: json-schema/coldleads-app-lead-context-schema.json
  - type: JSONSchema
    url: json-schema/coldleads-app-next-action-schema.json
  - type: JSONSchema
    url: json-schema/coldleads-app-verify-result-schema.json
- aid: coldleads-app:coldleads-app-verify-api
  name: Cold Leads Verify API
  description: The Verify API from Cold Leads — 3 operation(s) for verify.
  humanURL: https://coldleads.app/developers
  baseURL: https://coldleads.app/api/v1
  tags:
  - Verify
  properties:
  - type: OpenAPI
    url: openapi/coldleads-app-verify-api-openapi.yml
  - type: JSONSchema
    url: json-schema/coldleads-app-lead-context-schema.json
  - type: JSONSchema
    url: json-schema/coldleads-app-next-action-schema.json
  - type: JSONSchema
    url: json-schema/coldleads-app-verify-result-schema.json
x-enrichment:
  date: '2026-11-04'
  status: enriched
  artifacts_added: 29
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Cold Leads API — frequently asked questions

Does Cold Leads have an API?

Yes. APIs.io lists 8 APIs from Cold Leads, including Cold Leads Activity API, Cold Leads Credits API and Cold Leads Find API, and 5 more.

Is there an OpenAPI specification for the Cold Leads API?

Yes. APIs.io indexes 8 OpenAPI specifications for Cold Leads, each linked for download from this page.

How do I authenticate with the Cold Leads API?

Cold Leads documents its authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Coldleads App Authentication.

Does Cold Leads have an MCP server?

Yes. APIs.io lists 1 MCP server for Cold Leads: Remote MCP server at coldleads.app requiring OAuth.

Is the Cold Leads API ready for AI agents?

Cold Leads has a Kin Score of 51.2 out of 100 (developing) and an Agent Readiness score of 38.5 (agent-ready), scored by API Evangelist on 2026-11-06.

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