call4me

Call4me (Skeptrune LLC) provides an AI-powered phone call service that lets AI agents place calls, book appointments, and wait on hold, then patch the user into the conversation. Integrated with ChatGPT, Claude, and other LLMs, it offers a developer-friendly API and SDKs for seamless automation.

call4me publishes 8 API contracts indexed on the APIs.io network, including Balance API, Call4me API, Calls API, and 5 more. Tagged areas include Artificial Intelligence, Telephony, Automation, Software-as-a-Service, and Call4me.

The call4me catalog on APIs.io includes 1 Spectral governance ruleset.

call4me’s developer surface includes authentication, support, pricing, engineering blog, getting-started guide, API reference, and 18 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

35.3/100 thin Agent 54/100 agent ready Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

1 published contract 1 Agent Skills

Artificial Intelligence Telephony Automation Software-as-a-ServiceCall4me

Kin Score

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

Composite quality — 35.3/100 · thin

Contract Quality 10.9 / 21

Developer Ergonomics 4.6 / 17

Access Clarity 6.3 / 17

Operational Transparency 0.3 / 11

Contract Governance 1.9 / 10

Discoverability 5.6 / 9

Regulatory Posture 2.9 / 15

Agent readiness — 54/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 4 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 8 / 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 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):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
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
Agentic Commerce Well-Known Document +5 pts — a parsing /.well-known/ucp.json or acp.json declaring a version and at least one service, OR (0.27) a live x402 payment challenge from _data/x402-adoption.json — `self` when its endpoints are on the provider's own domain, `platform` when they are on a vendor's
Dry-Run / Simulate Mode +4 pts — OpenAPI: destructive operations expose a dry_run / simulate / preview / validate_only parameter

1 more unmet check in the Agent Readiness table above.

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

Developer Ergonomics scores 26.8 — up to +14.6 composite points
Operational Transparency scores 2.6 — up to +12.7 composite points
Access Clarity scores 36.8 — up to +12.6 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/call4-me/apis.yml: open an issue on github.com/api-evangelist/call4-me 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.

Agent2Agent

measured — observed by APIs.io (conformant)

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.

call4me Balance API

The Balance API from call4me — 1 operation(s) for balance.

call4me Call4me API

The Call4me API API from call4me — 1 operation(s) for call4me api.

call4me Calls API

The Calls API from call4me — 6 operation(s) for calls.

call4me Numbers API

The Numbers API from call4me — 5 operation(s) for numbers.

call4me Profile API

The Profile API from call4me — 1 operation(s) for profile.

call4me Requirements API

The Requirements API from call4me — 2 operation(s) for requirements.

call4me Scheduled Calls API

The Scheduled Calls API from call4me — 2 operation(s) for scheduled calls.

call4me X402 API

The X402 API from call4me — 1 operation(s) for x402.

Scroll for all 8

Agent Skills 1

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

call4-me-place-call

AGENT SKILL

call4me API pricing

Prices published by call4me.

Plan	Price
Standard	$0.25 a minute

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Call4 Me Plans Pricing

1 plans

PLANS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

call4me API Rules

51 rules · 45 errors 4 warnings 2 info

SPECTRAL

Security Posture 2

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

Call4 Me Authentication

1 scheme

SECURITY

Call4 Me Domain Security

TLSv1.3 · DNSSEC

SECURITY

Agentic Access 1

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

Call4 Me Agentic Access

22 operations · 13 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgentSkill

LLMsTxt

WellKnown

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Spectral

Idempotency

Conventions

ErrorCatalog

Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 4

Pricing, plans, and the legal terms of use

Plans

TermsOfService

PrivacyPolicy

Pricing

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 3

Properties that don't map to a standard resource type

AgentCard

AgentCard

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: call4-me
name: call4me
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://call4.me/og/site.png?v=3
description: Call4me (Skeptrune LLC) provides an AI-powered phone call service that lets AI agents place calls, book appointments,
  and wait on hold, then patch the user into the conversation. Integrated with ChatGPT, Claude, and other LLMs, it offers
  a developer-friendly API and SDKs for seamless automation.
url: https://artifacts.apis.io/call4-me/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:
- Artificial Intelligence
- Telephony
- Automation
- Software-as-a-Service
- Call4me
tags_raw:
- AI
- Telephony
- Automation
- SaaS
- Call4me
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/call4-me-agentic-access.yml
- type: Plans
  url: plans/call4-me-plans-pricing.yml
- type: Spectral
  url: rules/call4-me-rules.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Idempotency
  url: conventions/call4-me-conventions.yml
- type: Conventions
  url: conventions/call4-me-conventions.yml
- type: Authentication
  url: authentication/call4-me-authentication.yml
- type: ErrorCatalog
  url: errors/call4-me-problem-types.yml
- type: Conformance
  url: conformance/call4-me-conformance.yml
- type: LLMsTxt
  url: llms/call4-me-llms.txt
- type: AgentCard
  url: a2a/call4-me-a2a.yml
- type: WellKnown
  url: well-known/call4-me-well-known.yml
- type: Hosts
  url: hosts/call4-me-hosts.yml
- type: Vendors
  url: vendors/call4-me-vendors.yml
- type: TermsOfService
  url: https://call4.me/terms
- type: Support
  url: https://call4.me/support
- type: PrivacyPolicy
  url: https://call4.me/privacy
- type: Pricing
  url: https://call4.me/pricing
- type: GitHubOrganization
  url: https://github.com/skeptrunedev
- type: Blog
  url: https://call4.me/blog
- type: GettingStarted
  url: https://call4.me/blog/paradox-hotel-vancouver
- type: APIReference
  url: https://call4.me/.well-known/api-catalog
- type: DomainSecurity
  url: security/call4-me-domain-security.yml
- type: Website
  url: https://call4.me/
apis:
- aid: call4-me:call4-me-balance-api
  name: call4me Balance API
  description: The Balance API from call4me — 1 operation(s) for balance.
  humanURL: https://call4.me/
  baseURL: https://call4.me
  tags:
  - Balances
  tags_raw:
  - Balance
  properties:
  - type: OpenAPI
    url: openapi/call4-me-balance-api-openapi.yml
- aid: call4-me:call4-me-call4me-api-api
  name: call4me Call4me API
  description: The Call4me API API from call4me — 1 operation(s) for call4me api.
  humanURL: https://call4.me/
  baseURL: https://call4.me
  tags:
  - Call4me API
  properties:
  - type: OpenAPI
    url: openapi/call4-me-call4me-api-api-openapi.yml
- aid: call4-me:call4-me-calls-api
  name: call4me Calls API
  description: The Calls API from call4me — 6 operation(s) for calls.
  humanURL: https://call4.me/
  baseURL: https://call4.me
  tags:
  - Calls
  properties:
  - type: OpenAPI
    url: openapi/call4-me-calls-api-openapi.yml
- aid: call4-me:call4-me-numbers-api
  name: call4me Numbers API
  description: The Numbers API from call4me — 5 operation(s) for numbers.
  humanURL: https://call4.me/
  baseURL: https://call4.me
  tags:
  - Numbers
  properties:
  - type: OpenAPI
    url: openapi/call4-me-numbers-api-openapi.yml
- aid: call4-me:call4-me-profile-api
  name: call4me Profile API
  description: The Profile API from call4me — 1 operation(s) for profile.
  humanURL: https://call4.me/
  baseURL: https://call4.me
  tags:
  - Profiles
  tags_raw:
  - Profile
  properties:
  - type: OpenAPI
    url: openapi/call4-me-profile-api-openapi.yml
- aid: call4-me:call4-me-requirements-api
  name: call4me Requirements API
  description: The Requirements API from call4me — 2 operation(s) for requirements.
  humanURL: https://call4.me/
  baseURL: https://call4.me
  tags:
  - Requirements
  properties:
  - type: OpenAPI
    url: openapi/call4-me-requirements-api-openapi.yml
- aid: call4-me:call4-me-scheduled-calls-api
  name: call4me Scheduled Calls API
  description: The Scheduled Calls API from call4me — 2 operation(s) for scheduled calls.
  humanURL: https://call4.me/
  baseURL: https://call4.me
  tags:
  - Scheduled Calls
  properties:
  - type: OpenAPI
    url: openapi/call4-me-scheduled-calls-api-openapi.yml
- aid: call4-me:call4-me-x402-api
  name: call4me X402 API
  description: The X402 API from call4me — 1 operation(s) for x402.
  humanURL: https://call4.me/
  baseURL: https://call4.me
  tags:
  - x402
  tags_raw:
  - X402
  properties:
  - type: OpenAPI
    url: openapi/call4-me-x402-api-openapi.yml
x-enrichment:
  date: '2026-11-03'
  status: enriched
  artifacts_added: 31
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

call4me API — frequently asked questions

Does call4me have an API?

Yes. APIs.io lists 8 APIs from call4me, including call4me Balance API, call4me Call4me API and call4me Calls API, and 5 more.

Is there an OpenAPI specification for the call4me API?

Yes. APIs.io indexes 8 OpenAPI specifications for call4me, each linked for download from this page.

How do I authenticate with the call4me API?

call4me documents its authentication (1 scheme). The details are profiled on APIs.io as Call4 Me Authentication.

How much does the call4me API cost?

call4me publishes its prices; its Standard plan is $0.25 a minute as of 2026-11-03. APIs.io lists 1 pricing plan for call4me, with each plan's price, limits and inclusions under Pricing on this page.

Is the call4me API ready for AI agents?

call4me has a Kin Score of 35.3 out of 100 (thin) and an Agent Readiness score of 53.7 (agent-ready), scored by API Evangelist on 2026-11-06.

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