CallSync

CallSync is a bootstrapped business call tracking software company based in Panipat, India, founded by Yogesh Bhardwaj and Ramdiya in March 2026. An Android app on staff phones syncs SIM call logs, missed callbacks and call recordings into one team dashboard without changing numbers, alongside contacts, notes, a sales CRM and AI transcripts. CallSync publishes a REST API (base URL https://mcp.callsyncapp.com/api/v1, Bearer API key), webhooks, and a remote MCP connector for ChatGPT and Claude.

CallSync is listed with 2 APIs on the APIs.io network. Tagged areas include Company, Call Tracking, Call Recording, Android, and Sales CRM.

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

CallSync’s developer surface includes authentication, documentation, support, getting-started guide, engineering blog, pricing, signup flow, and 22 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

43.2/100 developing Agent 31/100 agent ready Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

2 APIs 1 MCP Servers

Company Call Tracking Call Recording AndroidSales CRMWebhooksMCP AI Agents

Kin Score

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

Composite quality — 43.2/100 · developing

Contract Quality 10.5 / 21

Developer Ergonomics 4.5 / 17

Access Clarity 8.6 / 17

Operational Transparency 0.4 / 11

Contract Governance 6.4 / 10

Discoverability 5.6 / 9

Regulatory Posture 3.1 / 15

Agent readiness — 31/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 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 7 / 7

Typed Event Surface 6 / 6

Agent Skills 0 / 5

Well-Known Catalog 4 / 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 5 / 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):

Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
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
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
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)

6 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 26.2 — up to +14.8 composite points
Contract Quality scores 49.4 — up to +12.7 composite points
Operational Transparency scores 3.9 — up to +12.5 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/callsyncapp-com/apis.yml: open an issue on github.com/api-evangelist/callsyncapp-com 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 1

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)

APIs 2

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

CallSync API

REST API for reading CallSync workspace data such as calls, CRM tasks and webhook subscriptions, authenticated with a workspace API key sent as an Authorization Bearer header.

CallSync API

CallSync API as documented publicly: 14 operations. Contract generated from the documentation by API Evangelist (2026-11-03); not the provider's own document.

MCP Servers 1

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

CallSync MCP Server

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Callsyncapp Com Plans Pricing

5 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Callsyncapp Com Rate Limits

0 limits

RATE LIMITS

Semantic Vocabularies 1

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

Callsyncapp Com Context

20 classes · 34 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

CallSync API Rules

47 rules · 45 errors 1 warnings 1 info

SPECTRAL

JSON Schema 6

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

PostApiV1CallsRequest

5 properties

JSON SCHEMA

PostApiV1CallsResponse

3 properties

JSON SCHEMA

PostCrmActivitiesRequest

4 properties

JSON SCHEMA

PostCrmContactsRequest

13 properties

JSON SCHEMA

PostCrmTasksRequest

8 properties

JSON SCHEMA

PostWebhooksRequest

2 properties

JSON SCHEMA

Security Posture 2

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

Callsyncapp Com Authentication

2 schemes

SECURITY

Callsyncapp Com Domain Security

TLSv1.3

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

SignUp

SignUp

Login

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

MCPServer

MCPServer

Design & Contract 9

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

Conventions

Lifecycle

ErrorCatalog

Conformance

Webhooks

Scroll for all 9

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support

Support

Contact

Contact

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 4

The organization behind the API

Newsroom

Website

Blog

About

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: callsyncapp-com
name: CallSync
description: CallSync is a bootstrapped business call tracking software company based in Panipat, India, founded by Yogesh
  Bhardwaj and Ramdiya in March 2026. An Android app on staff phones syncs SIM call logs, missed callbacks and call recordings
  into one team dashboard without changing numbers, alongside contacts, notes, a sales CRM and AI transcripts. CallSync publishes
  a REST API (base URL https://mcp.callsyncapp.com/api/v1, Bearer API key), webhooks, and a remote MCP connector for ChatGPT
  and Claude.
url: https://artifacts.apis.io/callsyncapp-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-03 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-03'
modified: '2026-11-03'
tags:
- Company
- Call Tracking
- Call Recording
- Android
- Sales CRM
- Webhooks
- MCP
- AI Agents
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
image: https://callsyncapp.com/media/callsync-intro-cover.jpg?v=0409289474
common:
- type: Plans
  url: plans/callsyncapp-com-plans-pricing.yml
- type: Spectral
  url: rules/callsyncapp-com-rules.yml
- type: JSONLD
  url: json-ld/callsyncapp-com-context.jsonld
- type: Vocabulary
  url: vocabulary/callsyncapp-com-vocabulary.yml
- type: DataModel
  url: data-model/callsyncapp-com-data-model.yml
- type: Conventions
  url: conventions/callsyncapp-com-conventions.yml
- type: Authentication
  url: authentication/callsyncapp-com-authentication.yml
- type: Lifecycle
  url: lifecycle/callsyncapp-com-lifecycle.yml
- type: ErrorCatalog
  url: errors/callsyncapp-com-problem-types.yml
- type: Conformance
  url: conformance/callsyncapp-com-conformance.yml
- type: WellKnown
  url: well-known/callsyncapp-com-well-known.yml
- type: Hosts
  url: hosts/callsyncapp-com-hosts.yml
- type: Vendors
  url: vendors/callsyncapp-com-vendors.yml
- type: Newsroom
  url: https://callsyncapp.com/media/callsync-intro-en.mp4?v=da5c9f9a27
- type: DomainSecurity
  url: security/callsyncapp-com-domain-security.yml
- type: Website
  url: https://callsyncapp.com/
- type: Documentation
  url: https://help.callsyncapp.com/
- type: Support
  url: https://help.callsyncapp.com/
- type: GettingStarted
  url: https://help.callsyncapp.com/how-it-works/
- type: Webhooks
  url: https://help.callsyncapp.com/webhook-guide/
- type: MCPServer
  url: https://help.callsyncapp.com/connect-ai-agent/
- type: Blog
  url: https://callsyncapp.com/blog/
- type: Pricing
  url: https://callsyncapp.com/pricing/
- type: About
  url: https://callsyncapp.com/about/
- type: Contact
  url: https://callsyncapp.com/contact/
- type: SignUp
  url: https://dash.callsyncapp.com/signup
- type: Login
  url: https://dash.callsyncapp.com/login
- type: TermsOfService
  url: https://callsyncapp.com/terms/
- type: PrivacyPolicy
  url: https://callsyncapp.com/privacy/
apis:
- aid: callsyncapp-com:callsync-api
  name: CallSync API
  description: REST API for reading CallSync workspace data such as calls, CRM tasks and webhook subscriptions, authenticated
    with a workspace API key sent as an Authorization Bearer header.
  humanURL: https://help.callsyncapp.com/api-guide/
  baseURL: https://mcp.callsyncapp.com/api/v1
  tags:
  - Calls
  - CRM
  - Webhooks
  properties:
  - type: Documentation
    url: https://help.callsyncapp.com/api-guide/
  - type: Webhooks
    url: https://help.callsyncapp.com/webhook-guide/
- aid: callsyncapp-com:callsyncapp-com-api
  name: CallSync API
  description: 'CallSync API as documented publicly: 14 operations. Contract generated from the documentation by API Evangelist
    (2026-11-03);

    not the provider''s own document.'
  humanURL: https://help.callsyncapp.com/api-guide
  baseURL: https://mcp.callsyncapp.com
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/callsyncapp-com-openapi-generated.yml
    x-provenance: generated
  - type: JSONSchema
    url: json-schema/callsyncapp-com-post-crm-tasks-request-schema.json
  - type: JSONSchema
    url: json-schema/callsyncapp-com-post-crm-contacts-request-schema.json
  - type: JSONSchema
    url: json-schema/callsyncapp-com-post-crm-activities-request-schema.json
  - type: JSONSchema
    url: json-schema/callsyncapp-com-post-webhooks-request-schema.json
  - type: JSONSchema
    url: json-schema/callsyncapp-com-post-api-v1-calls-response-schema.json
  - type: JSONSchema
    url: json-schema/callsyncapp-com-post-api-v1-calls-request-schema.json
x-coverage:
  state: covered
  reason: identity-verified
  detail: Name, description and pointers read from callsyncapp.com and help.callsyncapp.com pages, all fetched 200 on 2026-11-03.
  evidence:
  - url: https://callsyncapp.com/
    status: 200
  - url: https://callsyncapp.com/about/
    status: 200
  - url: https://help.callsyncapp.com/
    status: 200
  - url: https://help.callsyncapp.com/api-guide/
    status: 200
x-enrichment:
  date: '2026-11-03'
  status: enriched
  artifacts_added: 29
  pass: modular-v1
  engine: identity=anthropic,contract=anthropic,surfaces=anthropic,docs=anthropic,regulatory=anthropic

CallSync API — frequently asked questions

Does CallSync have an API?

Yes. APIs.io lists 2 APIs from CallSync, including CallSync API and CallSync API.

Is there an OpenAPI specification for the CallSync API?

Yes. APIs.io indexes 1 OpenAPI specification for CallSync, each linked for download from this page.

How do I authenticate with the CallSync API?

CallSync uses bearer-token authentication (2 schemes). The details are profiled on APIs.io as Callsyncapp Com Authentication.

How much does the CallSync API cost?

APIs.io lists 5 pricing plans for CallSync, with each plan's price, limits and inclusions under Pricing on this page.

Does CallSync have an MCP server?

Yes. APIs.io lists 1 MCP server for CallSync.

Is the CallSync API ready for AI agents?

CallSync has a Kin Score of 43.2 out of 100 (developing) and an Agent Readiness score of 30.7 (agent-ready), scored by API Evangelist on 2026-11-06.

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