Telefono

Telefono is a phone number intelligence and validation API platform providing real-time phone number lookup, validation, carrier information, line type detection, and number formatting services for developers. The platform helps businesses verify user phone numbers, detect fraud, improve deliverability of SMS campaigns, and enrich contact data with carrier and geographic information.

Telefono publishes 4 APIs on the APIs.io network, including Batch API, Carrier API, Format API, and 1 more. Tagged areas include Carrier Lookup, Data Enrichment, Fraud Prevention, Number Intelligence, and Number Verification.

The Telefono catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

Telefono’s developer surface includes authentication, getting-started guide, signup flow, pricing, support, GitHub presence, and 7 more developer resources.

🌐 Visit website 📡 Source on GitHub

32.2/100 thin ▬ flat Agent 20/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

3 APIs

Carrier Lookup Data Enrichment Fraud Prevention Number Intelligence Number Verification Phone Lookup Phone Validation Telecommunications

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 32.2/100 · thin

Contract Quality 10.7 / 19

Developer Ergonomics 2.5 / 15

Access Clarity 3.9 / 15

Operational Transparency 1.8 / 10

Contract Governance 1.2 / 9

Discoverability 6.1 / 8

Regulatory Posture 2.3 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 20/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 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

Regulatory Posture applies to this provider. Its tags matched the Telecommunications 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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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 github.com/api-evangelist/telefono: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 4

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

Telefono Batch API

Batch validation for multiple numbers

Telefono Carrier API

Carrier lookup endpoints

Telefono Format API

Number formatting and parsing endpoints

Telefono Validation API

Phone number validation endpoints

Open Collections 8

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Telefono Carrier Lookup Batch API

OPEN COLLECTION

Telefono Lookup Batch Carrier API

OPEN COLLECTION

Telefono Carrier Lookup API

OPEN COLLECTION

Telefono Carrier Lookup Batch Format API

OPEN COLLECTION

Telefono Number Formatting API

OPEN COLLECTION

Telefono Carrier Lookup Batch Validation API

OPEN COLLECTION

Telefono Phone Validation API

OPEN COLLECTION

Scroll for all 8

Pricing Plans 1

Published pricing tiers and plan structures.

Telefono Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Telefono Rate Limits

1 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Telefono Finops

FINOPS

Semantic Vocabularies 1

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

Telefono Context

4 classes · 18 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

Telefono API Rules

5 rules · 4 warnings 1 info

SPECTRAL

Telefono API Rules

11 rules · 5 errors 4 warnings 2 info

SPECTRAL

JSON Schema 1

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

Telefono Validation Result

14 properties

JSON SCHEMA

JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

Telefono Validation Result Structure

0 properties

JSON STRUCTURE

Examples 2

Example request and response payloads for these APIs.

Telefono Carrier Lookup Example

2 fields

EXAMPLE

Telefono Validate Number Example

2 fields

EXAMPLE

Security Posture 1

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

Telefono Authentication

apiKey · 1 scheme

SECURITY

Agentic Access 1

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

Telefono Agentic Access

4 operations · 1 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Signup

Signup

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHub

GitHub

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

Authentication

Authentication

Operate 3

Status, limits, changes, and where to get help

RateLimits

RateLimits

StatusPage

StatusPage

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

name: Telefono
description: Telefono is a phone number intelligence and validation API platform providing real-time phone number lookup,
  validation, carrier information, line type detection, and number formatting services for developers. The platform helps
  businesses verify user phone numbers, detect fraud, improve deliverability of SMS campaigns, and enrich contact data with
  carrier and geographic information.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown · no verifiable provider surface
  confidence: low
  source:
  - plans
  generated: '2026-08-14'
  method: derived
  note: 'Corrected 2026-08-14. The previous value (pricing "enterprise", onboarding "self-serve", confidence "high") contradicted
    its own cited source: the plans/ artifact it derives from states that the telefono.com slug does not resolve to a verifiable
    public product and that its tiers were synthetic. No pricing page, signup page or developer portal could be reached —
    see x-coverage below. The label is now unknown rather than asserted.'
image: https://www.telefono.com/logo.png
url: https://www.telefono.com
type: Index
tags:
- Carrier Lookup
- Data Enrichment
- Fraud Prevention
- Number Intelligence
- Number Verification
- Phone Lookup
- Phone Validation
- Telecommunications
created: '2024-01-15'
modified: '2026-05-19'
specificationVersion: '0.23'
apis:
- aid: telefono:telefono-batch-api
  name: Telefono Batch API
  description: Batch validation for multiple numbers
  humanURL: https://developers.telefono.com/validation
  baseURL: https://api.telefono.com/v1/validate
  tags:
  - Batch
  properties:
  - type: OpenAPI
    url: openapi/telefono-batch-api-openapi.yml
  - type: Documentation
    url: https://developers.telefono.com/validation
  - type: Authentication
    url: https://developers.telefono.com/authentication
  - type: GettingStarted
    url: https://developers.telefono.com/getting-started
  - type: Pricing
    url: https://www.telefono.com/pricing
  - type: RateLimits
    url: https://developers.telefono.com/rate-limits
  - type: Documentation
    url: https://developers.telefono.com/carrier
  - type: Pricing
    url: https://www.telefono.com/pricing/carrier
  - type: Documentation
    url: https://developers.telefono.com/format
- aid: telefono:telefono-carrier-api
  name: Telefono Carrier API
  description: Carrier lookup endpoints
  humanURL: https://developers.telefono.com/validation
  baseURL: https://api.telefono.com/v1/validate
  tags:
  - Carrier
  properties:
  - type: OpenAPI
    url: openapi/telefono-carrier-api-openapi.yml
  - type: Documentation
    url: https://developers.telefono.com/validation
  - type: Authentication
    url: https://developers.telefono.com/authentication
  - type: GettingStarted
    url: https://developers.telefono.com/getting-started
  - type: Pricing
    url: https://www.telefono.com/pricing
  - type: RateLimits
    url: https://developers.telefono.com/rate-limits
  - type: Documentation
    url: https://developers.telefono.com/carrier
  - type: Pricing
    url: https://www.telefono.com/pricing/carrier
  - type: Documentation
    url: https://developers.telefono.com/format
- aid: telefono:telefono-format-api
  name: Telefono Format API
  description: Number formatting and parsing endpoints
  humanURL: https://developers.telefono.com/validation
  baseURL: https://api.telefono.com/v1/validate
  tags:
  - Format
  properties:
  - type: OpenAPI
    url: openapi/telefono-format-api-openapi.yml
  - type: Documentation
    url: https://developers.telefono.com/validation
  - type: Authentication
    url: https://developers.telefono.com/authentication
  - type: GettingStarted
    url: https://developers.telefono.com/getting-started
  - type: Pricing
    url: https://www.telefono.com/pricing
  - type: RateLimits
    url: https://developers.telefono.com/rate-limits
  - type: Documentation
    url: https://developers.telefono.com/carrier
  - type: Pricing
    url: https://www.telefono.com/pricing/carrier
  - type: Documentation
    url: https://developers.telefono.com/format
- aid: telefono:telefono-validation-api
  name: Telefono Validation API
  description: Phone number validation endpoints
  humanURL: https://developers.telefono.com/validation
  baseURL: https://api.telefono.com/v1/validate
  tags:
  - Validation
  properties:
  - type: OpenAPI
    url: openapi/telefono-validation-api-openapi.yml
  - type: Documentation
    url: https://developers.telefono.com/validation
  - type: Authentication
    url: https://developers.telefono.com/authentication
  - type: GettingStarted
    url: https://developers.telefono.com/getting-started
  - type: Pricing
    url: https://www.telefono.com/pricing
  - type: RateLimits
    url: https://developers.telefono.com/rate-limits
  - type: Documentation
    url: https://developers.telefono.com/carrier
  - type: Pricing
    url: https://www.telefono.com/pricing/carrier
  - type: Documentation
    url: https://developers.telefono.com/format
common:
- type: Website
  url: https://www.telefono.com/
- type: AgenticAccess
  url: agentic-access/telefono-agentic-access.yml
- type: Authentication
  url: authentication/telefono-authentication.yml
- type: Authentication
  url: https://developers.telefono.com/authentication
- type: GettingStarted
  url: https://developers.telefono.com/getting-started
- type: RateLimits
  url: https://developers.telefono.com/rate-limits
- type: Signup
  url: https://www.telefono.com/signup
- type: Pricing
  url: https://www.telefono.com/pricing
- type: TermsOfService
  url: https://www.telefono.com/terms
- type: PrivacyPolicy
  url: https://www.telefono.com/privacy
- type: StatusPage
  url: https://status.telefono.com
- type: Support
  url: https://www.telefono.com/support
- type: GitHub
  url: https://github.com/telefono-api
maintainers:
- name: Telefono Team
  email: api@telefono.com
x-enrichment:
  date: '2026-08-14'
  status: minimal
  artifacts_added: 1
  pass: local-v1
x-coverage:
  state: none
  reason: defunct
  detail: 'telefono.com is a parked domain: its root serves a 346-byte HTML frameset whose only frame points at the domain
    marketplace domainnames.net, every other path on the host returns 404, and api./developers./status./docs.telefono.com
    are all NXDOMAIN — including api.telefono.com, the host declared in the servers[] block of every OpenAPI in this repo
    and in every apis[].baseURL.'
  evidence:
  - url: https://www.telefono.com/
    status: 200
  - url: https://www.telefono.com/pricing
    status: 404
  - url: https://www.telefono.com/signup
    status: 404
  - url: https://www.telefono.com/terms
    status: 404
  - url: https://www.telefono.com/.well-known/agent-card.json
    status: 404
  - url: https://www.telefono.com/llms.txt
    status: 404
  - url: https://api.telefono.com/v1/validate
    status: 0
  - url: https://developers.telefono.com/validation
    status: 0
  - url: https://status.telefono.com
    status: 0
  - url: https://github.com/telefono-api
    status: 404
  checked: '2026-08-14'

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