Numbers Online

Numbers Online is a phone-number trust and intelligence service operated by Evergrow Management Pte. Ltd. of Singapore. It runs a free public reverse phone lookup with a community-driven, advisory spam-risk score, paid number verification for people and businesses, and a B2B API keyed on a single E.164 primitive: parsing and validation, single and batch lookup (line type, range carrier, CNAM, STIR/SHAKEN verstat and a low-confidence spam signal), signed inbound caller intelligence with Ed25519 receipts, an outbound pre-call do-not-contact scrub and call-provenance enrollment, consent-first list scrubbing, a ClearIP-compatible SBC/SIP redirect decision, a multi-tenant MSP control plane, and a hosted read-only MCP server plus Vapi/Retell webhooks for AI voice agents. The 56-operation REST API is published as an OpenAPI 3.0.3 contract at /api/spec, with an llms.txt, an A2A agent card at /.well-known/agent-card.json, markdown mirrors of the docs, and a self-service free tier with no card.

Numbers Online publishes 17 API contracts indexed on the APIs.io network, including Account API, Community reporting API, Inbound API, and 14 more. Tagged areas include Phone Intelligence, Caller ID, CNAM, Reverse Phone Lookup, and Spam Detection.

Numbers Online’s developer surface includes authentication, documentation, API reference, getting-started guide, pricing, signup flow, changelog, and 39 more developer resources.

🌐 Visit website 📡 Source on GitHub

60.4/100 strong ▬ flat Agent 50/100 agent native Front door AI 3/6 light saas Full breakdown ↓
scored 2026-10-09 · rubric v0.23.0

2 published contracts 1 MCP Servers

Phone Intelligence Caller ID CNAMReverse Phone LookupSpam Detection Do Not Call TelephonySTIR/SHAKENMCP Agent-Native Compliance Company A2A

What this lets a business do 2

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

SaaS Tenant Management

BC-4230

MSP

GET /api/v1/account/tenants POST /api/v1/account/tenants PATCH /api/v1/account/tenants/{id} POST /api/v1/account/tenants/{id}/keys

Developer Platform & API Ecosystem Management

BC-4270

Account

POST /api/v1/account/signup GET /api/v1/account POST /api/v1/account/keys

Kin Score

Kin Score How this is scored →
scored 2026-10-09 · rubric v0.23.0

Composite quality — 60.4/100 · strong

Contract Quality 9.1 / 19

Developer Ergonomics 8.5 / 15

Access Clarity 12.6 / 15

Operational Transparency 5.9 / 10

Contract Governance 1.6 / 9

Discoverability 5.6 / 8

Regulatory Posture 5.6 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 50/100 · agent native

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 7 / 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 8 / 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 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 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/numbers-online: 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 17

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

Numbers Online MCP Server

A hosted, stateless, read-only Model Context Protocol server (JSON-RPC 2.0 over Streamable HTTP, protocol 2025-06-18) at POST https://numbers.online/api/v1/mcp for AI voice agen...

Numbers Online A2A Agent

An Agent-to-Agent (A2A protocolVersion 0.3.0, JSONRPC) endpoint at POST https://numbers.online/api/v1/a2a exposing four read-only skills — phone_lookup, line_type, caller_risk a...

Numbers Online Account API

Self-service API account: signup, balance, usage, credit top-ups, and the key lifecycle. Account-management endpoints require an account-level key with the 'manage' use case (ev...

Numbers Online Community reporting API

Key-gated spam/scam reporting — the give-to-get half of the community sensor (receipt-gated, tags-only, lane-scoped supplementary signals)

Numbers Online Inbound API

Inbound caller-intelligence lookup for operators, PBX, and softphones

Numbers Online Lookup API

Number lookup: line type, range carrier, CNAM, verstat, and a supplementary spam signal

Numbers Online MCP API

Model Context Protocol server for AI voice agents (Vapi, Retell, Pipecat, LiveKit): read-only phone-intelligence tools over Streamable HTTP

Numbers Online MSP API

Multi-tenant control plane: per-tenant sub-keys, usage rollups, and suppression lists for MSPs and PBX resellers

Numbers Online Outbound API

Outbound pre-call checks (scrub + call-provenance) and number enrollment for spoofing-defense

Numbers Online Parsing API

Phone number parsing and validation endpoints

Numbers Online PBX API

Plain-text caller-id lookup for header-less PBX integrations (FreeSWITCH mod_cidlookup and similar)

Numbers Online Receipts API

Signed, privacy-safe lookup receipts (Ed25519) — verifiable "checked as of T" evidence

Numbers Online Reference API

Reference data and examples

Numbers Online SBC / SIP API

SIP redirect-server decisions for session border controllers (Kamailio, OpenSIPS, dSIPRouter, Sansay, Oracle/Acme Packet, ProSBC) via the operator-run shim recipe, plus an FCC r...

Numbers Online System API

Operational endpoints (health checks)

Numbers Online Trust API

Contact-suppression preference lookups

Numbers Online Webhooks API

AI-voice-agent webhook adapters (Retell inbound, Vapi custom tool) over the same lookup backend

Scroll for all 17

MCP Servers 1

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

Numbers Online MCP Server

Numbers Online operates ONE hosted, stateless, read-only MCP server at POST https://numbers.online/api/v1/mcp (JSON-RPC 2.0 over Streamable HTTP; the provider and Vapi call the ...

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Numbers Online Plans Pricing

5 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Numbers Online Rate Limits

11 limits

RATE LIMITS

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Numbers Online Openapi Overlay

22 actions · update · numbers-online-openapi.yml

GENERATED

Security Posture 2

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

Numbers Online Authentication

apiKey/http · 3 schemes

SECURITY

Numbers Online Domain Security

TLSv1.3

SECURITY

Agentic Access 1

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

Numbers Online Agentic Access

56 operations · 35 acting · 3 human-in-the-loop

56 operations · 35 acting

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Login

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Guides

Guides

Agent Surfaces 10

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

LLMsTxt

WellKnown

LLMsTxt

AgentSkill

AgentSkill

AgentSkill

AgentSkill

AgentSkill

AgentSkill

Scroll for all 10

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conformance

ErrorCatalog

Lifecycle

Conventions

Idempotency

DataModel

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Trust

Trust

Operate 5

Status, limits, changes, and where to get help

Deprecation

RateLimits

ChangeLog

ChangeLog

Support

Commercial 4

Pricing, plans, and the legal terms of use

Pricing

TermsOfService

PrivacyPolicy

Plans

Company 2

The organization behind the API

Website

Website

About

About

Other 7

Properties that don't map to a standard resource type

CapabilityMap

AgentCard

AgentCard

Overlay

DataSubjectRequest

DataSubjectRequest

NoticeAndAction

NoticeAndAction

AgentInstructions

AgentInstructions

Scroll for all 7

Source (apis.yml)

aid: numbers-online
name: Numbers Online
description: 'Numbers Online is a phone-number trust and intelligence service operated by Evergrow Management Pte. Ltd. of
  Singapore. It runs a free public reverse phone lookup with a community-driven, advisory spam-risk score, paid number verification
  for people and businesses, and a B2B API keyed on a single E.164 primitive: parsing and validation, single and batch lookup
  (line type, range carrier, CNAM, STIR/SHAKEN verstat and a low-confidence spam signal), signed inbound caller intelligence
  with Ed25519 receipts, an outbound pre-call do-not-contact scrub and call-provenance enrollment, consent-first list scrubbing,
  a ClearIP-compatible SBC/SIP redirect decision, a multi-tenant MSP control plane, and a hosted read-only MCP server plus
  Vapi/Retell webhooks for AI voice agents. The 56-operation REST API is published as an OpenAPI 3.0.3 contract at /api/spec,
  with an llms.txt, an A2A agent card at /.well-known/agent-card.json, markdown mirrors of the docs, and a self-service free
  tier with no card.'
deliveryModel:
  model: saas
  license_evidence:
    not_product:
    - numbers-online/numbers-online-mcp
  open_source: unknown
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: low
  source:
  - openapi
  - pricing
  - repository-not-product
  generated: '2026-09-25'
  method: derived
image: https://numbers.online/android-chrome-512x512.png
url: https://raw.githubusercontent.com/api-evangelist/numbers-online/refs/heads/main/apis.yml
x-type: company
x-source: harvest:a2a-registry
x-tier: enriched
x-tier-reason: harvest
specificationVersion: '0.20'
created: '2026-09-19'
modified: '2026-09-19'
tags:
- Phone Intelligence
- Caller ID
- CNAM
- Reverse Phone Lookup
- Spam Detection
- Do Not Call
- Telephony
- STIR/SHAKEN
- MCP
- Agent-Native
- Compliance
- Company
- A2A
tags_raw:
- Phone Intelligence
- Caller ID
- CNAM
- Reverse Phone Lookup
- Spam Detection
- Do Not Call
- Telephony
- STIR/SHAKEN
- MCP
- agent-native
- Compliance
- Company
- A2A
apis:
- aid: numbers-online:numbers-online-mcp-server
  name: Numbers Online MCP Server
  description: A hosted, stateless, read-only Model Context Protocol server (JSON-RPC 2.0 over Streamable HTTP, protocol 2025-06-18)
    at POST https://numbers.online/api/v1/mcp for AI voice agents (Vapi, Retell, Pipecat, LiveKit). initialize, ping and tools/list
    are public; tools/call requires an API key with the mcp use case. Live tools/list returns phone_lookup, line_type, caller_risk
    and dnc_check, each annotated readOnlyHint/idempotentHint. Every output is a supplementary, low-confidence signal; the
    calling agent keeps every routing and dialing decision. Billed $0.015 per tool call on the standard tier.
  image: https://numbers.online/android-chrome-512x512.png
  humanURL: https://numbers.online/docs/integrations/ai-voice-agents-mcp
  baseURL: https://numbers.online/api/v1/mcp
  tags:
  - MCP
  - Agent-Native
  - Phone Intelligence
  tags_raw:
  - MCP
  - agent-native
  - Phone Intelligence
  properties:
  - type: MCPServer
    url: mcp/numbers-online-mcp.yml
  - type: MCPServer
    url: https://numbers.online/api/v1/mcp
  - type: Documentation
    url: https://numbers.online/docs/integrations/ai-voice-agents-mcp
  - type: ToolCrosswalk
    url: mcp/numbers-online-tool-crosswalk.yml
  - type: GitHubRepository
    url: https://github.com/numbers-online/numbers-online-mcp
  - type: Authentication
    url: authentication/numbers-online-authentication.yml
  - type: AgentCard
    url: a2a/numbers-online-a2a.yml
  - type: RateLimits
    url: rate-limits/numbers-online-rate-limits.yml
  - type: Plans
    url: plans/numbers-online-plans-pricing.yml
- aid: numbers-online:numbers-online-a2a-agent
  name: Numbers Online A2A Agent
  description: An Agent-to-Agent (A2A protocolVersion 0.3.0, JSONRPC) endpoint at POST https://numbers.online/api/v1/a2a exposing
    four read-only skills — phone_lookup, line_type, caller_risk and dnc_check — the same capabilities as the MCP tools. Discovered
    via the provider-served agent card at /.well-known/agent-card.json (also /.well-known/agent.json and /api/agent-card).
    Bearer API key with the mcp use case; anonymous message/send returns 401 missing_key and GET returns 405. This endpoint
    is not described in the OpenAPI.
  image: https://numbers.online/android-chrome-512x512.png
  humanURL: https://numbers.online/docs
  baseURL: https://numbers.online/api/v1/a2a
  tags:
  - A2A
  - Agent-Native
  - Phone Intelligence
  tags_raw:
  - A2A
  - agent-native
  - Phone Intelligence
  properties:
  - type: AgentCard
    url: a2a/numbers-online-a2a.yml
  - type: AgentCard
    url: https://numbers.online/.well-known/agent-card.json
  - type: Documentation
    url: https://numbers.online/docs
  - type: ToolCrosswalk
    url: mcp/numbers-online-tool-crosswalk.yml
- aid: numbers-online:numbers-online-account-api
  name: Numbers Online Account API
  description: 'Self-service API account: signup, balance, usage, credit top-ups, and the key lifecycle. Account-management
    endpoints require an account-level key with the ''manage'' use case (every self-service key holds it unless deliberately
    narrowed; the per-key signing config is exempt).'
  humanURL: https://numbers.online/docs
  baseURL: https://numbers.online/api/v1/mcp
  tags:
  - Account
  properties:
  - type: OpenAPI
    url: openapi/numbers-online-account-api-openapi.yml
  - type: Documentation
    url: https://numbers.online/docs
  - type: APIReference
    url: https://numbers.online/docs
  - type: GettingStarted
    url: https://numbers.online/developers
  - type: Guides
    url: https://numbers.online/docs/integrations
  - type: Authentication
    url: authentication/numbers-online-authentication.yml
  - type: Conventions
    url: conventions/numbers-online-conventions.yml
  - type: Idempotency
    url: conventions/numbers-online-conventions.yml
  - type: ErrorCatalog
    url: errors/numbers-online-problem-types.yml
  - type: RateLimits
    url: rate-limits/numbers-online-rate-limits.yml
  - type: Plans
    url: plans/numbers-online-plans-pricing.yml
  - type: Lifecycle
    url: lifecycle/numbers-online-lifecycle.yml
  - type: ChangeLog
    url: changelog/numbers-online-changelog.yml
  - type: DataModel
    url: data-model/numbers-online-data-model.yml
  - type: Conformance
    url: conformance/numbers-online-conformance.yml
  - type: AgenticAccess
    url: agentic-access/numbers-online-agentic-access.yml
  - type: LLMsTxt
    url: https://numbers.online/llms.txt
  - type: Pricing
    url: https://numbers.online/pricing
  - type: SignUp
    url: https://numbers.online/developers
- aid: numbers-online:numbers-online-community-reporting-api
  name: Numbers Online Community reporting API
  description: Key-gated spam/scam reporting — the give-to-get half of the community sensor (receipt-gated, tags-only, lane-scoped
    supplementary signals)
  humanURL: https://numbers.online/docs
  baseURL: https://numbers.online/api/v1/mcp
  tags:
  - Community reporting
  properties:
  - type: OpenAPI
    url: openapi/numbers-online-community-reporting-api-openapi.yml
  - type: Documentation
    url: https://numbers.online/docs
  - type: APIReference
    url: https://numbers.online/docs
  - type: GettingStarted
    url: https://numbers.online/developers
  - type: Guides
    url: https://numbers.online/docs/integrations
  - type: Authentication
    url: authentication/numbers-online-authentication.yml
  - type: Conventions
    url: conventions/numbers-online-conventions.yml
  - type: Idempotency
    url: conventions/numbers-online-conventions.yml
  - type: ErrorCatalog
    url: errors/numbers-online-problem-types.yml
  - type: RateLimits
    url: rate-limits/numbers-online-rate-limits.yml
  - type: Plans
    url: plans/numbers-online-plans-pricing.yml
  - type: Lifecycle
    url: lifecycle/numbers-online-lifecycle.yml
  - type: ChangeLog
    url: changelog/numbers-online-changelog.yml
  - type: DataModel
    url: data-model/numbers-online-data-model.yml
  - type: Conformance
    url: conformance/numbers-online-conformance.yml
  - type: AgenticAccess
    url: agentic-access/numbers-online-agentic-access.yml
  - type: LLMsTxt
    url: https://numbers.online/llms.txt
  - type: Pricing
    url: https://numbers.online/pricing
  - type: SignUp
    url: https://numbers.online/developers
- aid: numbers-online:numbers-online-inbound-api
  name: Numbers Online Inbound API
  description: Inbound caller-intelligence lookup for operators, PBX, and softphones
  humanURL: https://numbers.online/docs
  baseURL: https://numbers.online/api/v1/mcp
  tags:
  - Inbound
  properties:
  - type: OpenAPI
    url: openapi/numbers-online-inbound-api-openapi.yml
  - type: Documentation
    url: https://numbers.online/docs
  - type: APIReference
    url: https://numbers.online/docs
  - type: GettingStarted
    url: https://numbers.online/developers
  - type: Guides
    url: https://numbers.online/docs/integrations
  - type: Authentication
    url: authentication/numbers-online-authentication.yml
  - type: Conventions
    url: conventions/numbers-online-conventions.yml
  - type: Idempotency
    url: conventions/numbers-online-conventions.yml
  - type: ErrorCatalog
    url: errors/numbers-online-problem-types.yml
  - type: RateLimits
    url: rate-limits/numbers-online-rate-limits.yml
  - type: Plans
    url: plans/numbers-online-plans-pricing.yml
  - type: Lifecycle
    url: lifecycle/numbers-online-lifecycle.yml
  - type: ChangeLog
    url: changelog/numbers-online-changelog.yml
  - type: DataModel
    url: data-model/numbers-online-data-model.yml
  - type: Conformance
    url: conformance/numbers-online-conformance.yml
  - type: AgenticAccess
    url: agentic-access/numbers-online-agentic-access.yml
  - type: LLMsTxt
    url: https://numbers.online/llms.txt
  - type: Pricing
    url: https://numbers.online/pricing
  - type: SignUp
    url: https://numbers.online/developers
- aid: numbers-online:numbers-online-lookup-api
  name: Numbers Online Lookup API
  description: 'Number lookup: line type, range carrier, CNAM, verstat, and a supplementary spam signal'
  humanURL: https://numbers.online/docs
  baseURL: https://numbers.online/api/v1/mcp
  tags:
  - Lookup
  properties:
  - type: OpenAPI
    url: openapi/numbers-online-lookup-api-openapi.yml
  - type: Documentation
    url: https://numbers.online/docs
  - type: APIReference
    url: https://numbers.online/docs
  - type: GettingStarted
    url: https://numbers.online/developers
  - type: Guides
    url: https://numbers.online/docs/integrations
  - type: Authentication
    url: authentication/numbers-online-authentication.yml
  - type: Conventions
    url: conventions/numbers-online-conventions.yml
  - type: Idempotency
    url: conventions/numbers-online-conventions.yml
  - type: ErrorCatalog
    url: errors/numbers-online-problem-types.yml
  - type: RateLimits
    url: rate-limits/numbers-online-rate-limits.yml
  - type: Plans
    url: plans/numbers-online-plans-pricing.yml
  - type: Lifecycle
    url: lifecycle/numbers-online-lifecycle.yml
  - type: ChangeLog
    url: changelog/numbers-online-changelog.yml
  - type: DataModel
    url: data-model/numbers-online-data-model.yml
  - type: Conformance
    url: conformance/numbers-online-conformance.yml
  - type: AgenticAccess
    url: agentic-access/numbers-online-agentic-access.yml
  - type: LLMsTxt
    url: https://numbers.online/llms.txt
  - type: Pricing
    url: https://numbers.online/pricing
  - type: SignUp
    url: https://numbers.online/developers
- aid: numbers-online:numbers-online-mcp-api
  name: Numbers Online MCP API
  description: 'Model Context Protocol server for AI voice agents (Vapi, Retell, Pipecat, LiveKit): read-only phone-intelligence
    tools over Streamable HTTP'
  humanURL: https://numbers.online/docs
  baseURL: https://numbers.online/api/v1/mcp
  tags:
  - MCP
  properties:
  - type: OpenAPI
    url: openapi/numbers-online-mcp-api-openapi.yml
  - type: Documentation
    url: https://numbers.online/docs
  - type: APIReference
    url: https://numbers.online/docs
  - type: GettingStarted
    url: https://numbers.online/developers
  - type: Guides
    url: https://numbers.online/docs/integrations
  - type: Authentication
    url: authentication/numbers-online-authentication.yml
  - type: Conventions
    url: conventions/numbers-online-conventions.yml
  - type: Idempotency
    url: conventions/numbers-online-conventions.yml
  - type: ErrorCatalog
    url: errors/numbers-online-problem-types.yml
  - type: RateLimits
    url: rate-limits/numbers-online-rate-limits.yml
  - type: Plans
    url: plans/numbers-online-plans-pricing.yml
  - type: Lifecycle
    url: lifecycle/numbers-online-lifecycle.yml
  - type: ChangeLog
    url: changelog/numbers-online-changelog.yml
  - type: DataModel
    url: data-model/numbers-online-data-model.yml
  - type: Conformance
    url: conformance/numbers-online-conformance.yml
  - type: AgenticAccess
    url: agentic-access/numbers-online-agentic-access.yml
  - type: LLMsTxt
    url: https://numbers.online/llms.txt
  - type: Pricing
    url: https://numbers.online/pricing
  - type: SignUp
    url: https://numbers.online/developers
- aid: numbers-online:numbers-online-msp-api
  name: Numbers Online MSP API
  description: 'Multi-tenant control plane: per-tenant sub-keys, usage rollups, and suppression lists for MSPs and PBX resellers'
  humanURL: https://numbers.online/docs
  baseURL: https://numbers.online/api/v1/mcp
  tags:
  - MSP
  properties:
  - type: OpenAPI
    url: openapi/numbers-online-msp-api-openapi.yml
  - type: Documentation
    url: https://numbers.online/docs
  - type: APIReference
    url: https://numbers.online/docs
  - type: GettingStarted
    url: https://numbers.online/developers
  - type: Guides
    url: https://numbers.online/docs/integrations
  - type: Authentication
    url: authentication/numbers-online-authentication.yml
  - type: Conventions
    url: conventions/numbers-online-conventions.yml
  - type: Idempotency
    url: conventions/numbers-online-conventions.yml
  - type: ErrorCatalog
    url: errors/numbers-online-problem-types.yml
  - type: RateLimits
    url: rate-limits/numbers-online-rate-limits.yml
  - type: Plans
    url: plans/numbers-online-plans-pricing.yml
  - type: Lifecycle
    url: lifecycle/numbers-online-lifecycle.yml
  - type: ChangeLog
    url: changelog/numbers-online-changelog.yml
  - type: DataModel
    url: data-model/numbers-online-data-model.yml
  - type: Conformance
    url: conformance/numbers-online-conformance.yml
  - type: AgenticAccess
    url: agentic-access/numbers-online-agentic-access.yml
  - type: LLMsTxt
    url: https://numbers.online/llms.txt
  - type: Pricing
    url: https://numbers.online/pricing
  - type: SignUp
    url: https://numbers.online/developers
- aid: numbers-online:numbers-online-outbound-api
  name: Numbers Online Outbound API
  description: Outbound pre-call checks (scrub + call-provenance) and number enrollment for spoofing-defense
  humanURL: https://numbers.online/docs
  baseURL: https://numbers.online/api/v1/mcp
  tags:
  - Outbound
  properties:
  - type: OpenAPI
    url: openapi/numbers-online-outbound-api-openapi.yml
  - type: Documentation
    url: https://numbers.online/docs
  - type: APIReference
    url: https://numbers.online/docs
  - type: GettingStarted
    url: https://numbers.online/developers
  - type: Guides
    url: https://numbers.online/docs/integrations
  - type: Authentication
    url: authentication/numbers-online-authentication.yml
  - type: Conventions
    url: conventions/numbers-online-conventions.yml
  - type: Idempotency
    url: conventions/numbers-online-conventions.yml
  - type: ErrorCatalog
    url: errors/numbers-online-problem-types.yml
  - type: RateLimits
    url: rate-limits/numbers-online-rate-limits.yml
  - type: Plans
    url: plans/numbers-online-plans-pricing.yml
  - type: Lifecycle
    url: lifecycle/numbers-online-lifecycle.yml
  - type: ChangeLog
    url: changelog/numbers-online-changelog.yml
  - type: DataModel
    url: data-model/numbers-online-data-model.yml
  - type: Conformance
    url: conformance/numbers-online-conformance.yml
  - type: AgenticAccess
    url: agentic-access/numbers-online-agentic-access.yml
  - type: LLMsTxt
    url: https://numbers.online/llms.txt
  - type: Pricing
    url: https://numbers.online/pricing
  - type: SignUp
    url: https://numbers.online/developers
- aid: numbers-online:numbers-online-parsing-api
  name: Numbers Online Parsing API
  description: Phone number parsing and validation endpoints
  humanURL: https://numbers.online/docs
  baseURL: https://numbers.online/api/v1/mcp
  tags:
  - Parsing
  properties:
  - type: OpenAPI
    url: openapi/numbers-online-parsing-api-openapi.yml
  - type: Documentation
    url: https://numbers.online/docs
  - type: APIReference
    url: https://numbers.online/docs
  - type: GettingStarted
    url: https://numbers.online/developers
  - type: Guides
    url: https://numbers.online/docs/integrations
  - type: Authentication
    url: authentication/numbers-online-authentication.yml
  - type: Conventions
    url: conventions/numbers-online-conventions.yml
  - type: Idempotency
    url: conventions/numbers-online-conventions.yml
  - type: ErrorCatalog
    url: errors/numbers-online-problem-types.yml
  - type: RateLimits
    url: rate-limits/numbers-online-rate-limits.yml
  - type: Plans
    url: plans/numbers-online-plans-pricing.yml
  - type: Lifecycle
    url: lifecycle/numbers-online-lifecycle.yml
  - type: ChangeLog
    url: changelog/numbers-online-changelog.yml
  - type: DataModel
    url: data-model/numbers-online-data-model.yml
  - type: Conformance
    url: conformance/numbers-online-conformance.yml
  - type: AgenticAccess
    url: agentic-access/numbers-online-agentic-access.yml
  - type: LLMsTxt
    url: https://numbers.online/llms.txt
  - type: Pricing
    url: https://numbers.online/pricing
  - type: SignUp
    url: https://numbers.online/developers
- aid: numbers-online:numbers-online-pbx-api
  name: Numbers Online PBX API
  description: Plain-text caller-id lookup for header-less PBX integrations (FreeSWITCH mod_cidlookup and similar)
  humanURL: https://numbers.online/docs
  baseURL: https://numbers.online/api/v1/mcp
  tags:
  - PBX
  properties:
  - type: OpenAPI
    url: openapi/numbers-online-pbx-api-openapi.yml
  - type: Documentation
    url: https://numbers.online/docs
  - type: APIReference
    url: https://numbers.online/docs
  - type: GettingStarted
    url: https://numbers.online/developers
  - type: Guides
    url: https://numbers.online/docs/integrations
  - type: Authentication
    url: authentication/numbers-online-authentication.yml
  - type: Conventions
    url: conventions/numbers-online-conventions.yml
  - type: Idempotency
    url: conventions/numbers-online-conventions.yml
  - type: ErrorCatalog
    url: errors/numbers-online-problem-types.yml
  - type: RateLimits
    url: rate-limits/numbers-online-rate-limits.yml
  - type: Plans
    url: plans/numbers-online-plans-pricing.yml
  - type: Lifecycle
    url: lifecycle/numbers-online-lifecycle.yml
  - type: ChangeLog
    url: changelog/numbers-online-changelog.yml
  - type: DataModel
    url: data-model/numbers-online-data-model.yml
  - type: Conformance
    url: conformance/numbers-online-conformance.yml
  - type: AgenticAccess
    url: agentic-access/numbers-online-agentic-access.yml
  - type: LLMsTxt
    url: https://numbers.online/llms.txt
  - type: Pricing
    url: https://numbers.online/pricing
  - type: SignUp
    url: https://numbers.online/developers
- aid: numbers-online:numbers-online-receipts-api
  name: Numbers Online Receipts API
  description: Signed, privacy-safe lookup receipts (Ed25519) — verifiable "checked as of T" evidence
  humanURL: https://numbers.online/docs
  baseURL: https://numbers.online/api/v1/mcp
  tags:
  - Receipts
  properties:
  - type: OpenAPI
    url: openapi/numbers-online-receipts-api-openapi.yml
  - type: Documentation
    url: https://numbers.online/docs
  - type: APIReference
    url: https://numbers.online/docs
  - type: GettingStarted
    url: https://numbers.online/developers
  - type: Guides
    url: https://numbers.online/docs/integrations
  - type: Authentication
    url: authentication/numbers-online-authentication.yml
  - type: Conventions
    url: conventions/numbers-online-conventions.yml
  - type: Idempotency
    url: conventions/numbers-online-conventions.yml
  - type: ErrorCatalog
    url: errors/numbers-online-problem-types.yml
  - type: RateLimits
    url: rate-limits/numbers-online-rate-limits.yml
  - type: Plans
    url: plans/numbers-online-plans-pricing.yml
  - type: Lifecycle
    url: lifecycle/numbers-online-lifecycle.yml
  - type: ChangeLog
    url: changelog/numbers-online-changelog.yml
  - type: DataModel
    url: data-model/numbers-online-data-model.yml
  - type: Conformance
    url: conformance/numbers-online-conformance.yml
  - type: AgenticAccess
    url: agentic-access/numbers-online-agentic-access.yml
  - type: LLMsTxt
    url: https://numbers.online/llms.txt
  - type: Pricing
    url: https://numbers.online/pricing
  - type: SignUp
    url: https://numbers.online/developers
- aid: numbers-online:numbers-online-reference-api
  name: Numbers Online Reference API
  description: Reference data and examples
  humanURL: https://numbers.online/docs
  baseURL: https://numbers.online/api/v1/mcp
  tags:
  - Reference
  properties:
  - type: OpenAPI
    url: openapi/numbers-online-reference-api-openapi.yml
  - type: Documentation
    url: https://numbers.online/docs
  - type: APIReference
    url: https://numbers.online/docs
  - type: GettingStarted
    url: https://numbers.online/developers
  - type: Guides
    url: https://numbers.online/docs/integrations
  - type: Authentication
    url: authentication/numbers-online-authentication.yml
  - type: Conventions
    url: conventions/numbers-online-conventions.yml
  - type: Idempotency
    url: conventions/numbers-online-conventions.yml
  - type: ErrorCatalog
    url: errors/numbers-online-problem-types.yml
  - type: RateLimits
    url: rate-limits/numbers-online-rate-limits.yml
  - type: Plans
    url: plans/numbers-online-plans-pricing.yml
  - type: Lifecycle
    url: lifecycle/numbers-online-lifecycle.yml
  - type: ChangeLog
    url: changelog/numbers-online-changelog.yml
  - type: DataModel
    url: data-model/numbers-online-data-model.yml
  - type: Conformance
    url: conformance/numbers-online-conformance.yml
  - type: AgenticAccess
    url: agentic-access/numbers-online-agentic-access.yml
  - type: LLMsTxt
    url: https://numbers.online/llms.txt
  - type: Pricing
    url: https://numbers.online/pricing
  - type: SignUp
    url: https://numbers.online/developers
- aid: numbers-online:numbers-online-sbc-sip-api
  name: Numbers Online SBC / SIP API
  description: SIP redirect-server decisions for session border controllers (Kamailio, OpenSIPS, dSIPRouter, Sansay, Oracle/Acme
    Packet, ProSBC) via the operator-run shim recipe, plus an FCC robocall-mitigation evidence bundle — a supplementary call-setup
    signal, fail-open
  humanURL: https://numbers.online/docs
  baseURL: https://numbers.online/api/v1/mcp
  tags:
  - SBC / SIP
  properties:
  - type: OpenAPI
    url: openapi/numbers-online-sbc-sip-api-openapi.yml
  - type: Documentation
    url: https://numbers.online/docs
  - type: APIReference
    url: https://numbers.online/docs
  - type: GettingStarted
    url: https://numbers.online/developers
  - type: Guides
    url: https://numbers.online/docs/integrations
  - type: Authentication
    url: authentication/numbers-online-authentication.yml
  - type: Conventions
    url: conventions/numbers-online-conventions.yml
  - type: Idempotency
    url: conventions/numbers-online-conventions.yml
  - type: ErrorCatalog
    url: errors/numbers-online-problem-types.yml
  - type: RateLimits
    url: rate-limits/numbers-online-rate-limits.yml
  - type: Plans
    url: plans/numbers-online-plans-pricing.yml
  - type: Lifecycle
    url: lifecycle/numbers-online-lifecycle.yml
  - type: ChangeLog
    url: changelog/numbers-online-changelog.yml
  - type: DataModel
    url: data-model/numbers-online-data-model.yml
  - type: Conformance
    url: conformance/numbers-online-conformance.yml
  - type: AgenticAccess
    url: agentic-access/numbers-online-agentic-access.yml
  - type: LLMsTxt
    url: https://numbers.online/llms.txt
  - type: Pricing
    url: https://numbers.online/pricing
  - type: SignUp
    url: https://numbers.online/developers
- aid: numbers-online:numbers-online-system-api
  name: Numbers Online System API
  description: Operational endpoints (health checks)
  humanURL: https://numbers.online/docs
  baseURL: https://numbers.online/api/v1/mcp
  tags:
  - System
  properties:
  - type: OpenAPI
    url: openapi/numbers-online-system-api-openapi.yml
  - type: Documentation
    url: https://numbers.online/docs
  - type: APIReference
    url: https://numbers.online/docs
  - type: GettingStarted
    url: https://numbers.online/developers
  - type: Guides
    url: https://numbers.online/docs/integrations
  - type: Authentication
    url: authentication/numbers-online-authentication.yml
  - type: Conventions
    url: conventions/numbers-online-conventions.yml
  - type: Idempotency
    url: conventions/numbers-online-conventions.yml
  - type: ErrorCatalog
    url: errors/numbers-online-problem-types.yml
  - type: RateLimits
    url: rate-limits/numbers-online-rate-limits.yml
  - type: Plans
    url: plans/numbers-online-plans-pricing.yml
  - type: Lifecycle
    url: lifecycle/numbers-online-lifecycle.yml
  - type: ChangeLog
    url: changelog/numbers-online-changelog.yml
  - type: DataModel
    url: data-model/numbers-online-data-model.yml
  - type: Conformance
    url: conformance/numbers-online-conformance.yml
  - type: AgenticAccess
    url: agentic-access/numbers-online-agentic-access.yml
  - type: LLMsTxt
    url: https://numbers.online/llms.txt
  - type: Pricing
    url: https://numbers.online/pricing
  - type: SignUp
    url: https://numbers.online/developers
- aid: numbers-online:numbers-online-trust-api
  name: Numbers Online Trust API
  description: Contact-suppression preference lookups
  humanURL: https://numbers.online/docs
  baseURL: https://numbers.online/api/v1/mcp
  tags:
  - Trust
  properties:
  - type: OpenAPI
    url: openapi/numbers-online-trust-api-openapi.yml
  - type: Documentation
    url: https://numbers.online/docs
  - type: APIReference
    url: https://numbers.online/docs
  - type: GettingStarted
    url: https://numbers.online/developers
  - type: Guides
    url: https://numbers.online/docs/integrations
  - type: Authentication
    url: authentication/numbers-online-authentication.yml
  - type: Conventions
    url: conventions/numbers-online-conventions.yml
  - type: Idempotency
    url: conventions/numbers-online-conventions.yml
  - type: ErrorCatalog
    url: errors/numbers-online-problem-types.yml
  - type: RateLimits
    url: rate-limits/numbers-online-rate-limits.yml
  - type: Plans
    url: plans/numbers-online-plans-pricing.yml
  - type: Lifecycle
    url: lifecycle/numbers-online-lifecycle.yml
  - type: ChangeLog
    url: changelog/numbers-online-changelog.yml
  - type: DataModel
    url: data-model/numbers-online-data-model.yml
  - type: Conformance
    url: conformance/numbers-online-conformance.yml
  - type: AgenticAccess
    url: agentic-access/numbers-online-agentic-access.yml
  - type: LLMsTxt
    url: https://numbers.online/llms.txt
  - type: Pricing
    url: https://numbers.online/pricing
  - type: SignUp
    url: https://numbers.online/developers
- aid: numbers-online:numbers-online-webhooks-api
  name: Numbers Online Webhooks API
  description: AI-voice-agent webhook adapters (Retell inbound, Vapi custom tool) over the same lookup backend
  humanURL: https://numbers.online/docs
  baseURL: https://numbers.online/api/v1/mcp
  tags:
  - Webhook
  tags_raw:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/numbers-online-webhooks-api-openapi.yml
  - type: Documentation
    url: https://numbers.online/docs
  - type: APIReference
    url: https://numbers.online/docs
  - type: GettingStarted
    url: https://numbers.online/developers
  - type: Guides
    url: https://numbers.online/docs/integrations
  - type: Authentication
    url: authentication/numbers-online-authentication.yml
  - type: Conventions
    url: conventions/numbers-online-conventions.yml
  - type: Idempotency
    url: conventions/numbers-online-conventions.yml
  - type: ErrorCatalog
    url: errors/numbers-online-problem-types.yml
  - type: RateLimits
    url: rate-limits/numbers-online-rate-limits.yml
  - type: Plans
    url: plans/numbers-online-plans-pricing.yml
  - type: Lifecycle
    url: lifecycle/numbers-online-lifecycle.yml
  - type: ChangeLog
    url: changelog/numbers-online-changelog.yml
  - type: DataModel
    url: data-model/numbers-online-data-model.yml
  - type: Conformance
    url: conformance/numbers-online-conformance.yml
  - type: AgenticAccess
    url: agentic-access/numbers-online-agentic-access.yml
  - type: LLMsTxt
    url: https://numbers.online/llms.txt
  - type: Pricing
    url: https://numbers.online/pricing
  - type: SignUp
    url: https://numbers.online/developers
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: CapabilityMap
  url: capabilities/numbers-online-capability-edges.yml
  name: Numbers Online Business Capability Map
- type: Website
  url: https://numbers.online/
- type: DomainSecurity
  url: security/numbers-online-domain-security.yml
- type: AgenticAccess
  url: agentic-access/numbers-online-agentic-access.yml
- type: Authentication
  url: authentication/numbers-online-authentication.yml
- type: DeveloperPortal
  url: https://numbers.online/developers
- type: Documentation
  url: https://numbers.online/docs
- type: APIReference
  url: https://numbers.online/docs
- type: GettingStarted
  url: https://numbers.online/developers
- type: Pricing
  url: https://numbers.online/pricing
- type: SignUp
  url: https://numbers.online/developers
- type: Login
  url: https://numbers.online/login
- type: TermsOfService
  url: https://numbers.online/terms
- type: PrivacyPolicy
  url: https://numbers.online/privacy
- type: About
  url: https://numbers.online/about
- type: Trust
  url: https://numbers.online/trust
- type: GitHubOrganization
  url: https://github.com/numbers-online
- type: LLMsTxt
  url: https://numbers.online/llms.txt
- type: AgentCard
  url: a2a/numbers-online-a2a.yml
- type: AgentCard
  url: https://numbers.online/.well-known/agent-card.json
  name: Provider-served A2A agent card (protocolVersion 0.3.0)
- type: WellKnown
  url: well-known/numbers-online-well-known.yml
- type: LLMsTxt
  url: llms/numbers-online-llms.txt
- type: Packages
  url: packages/numbers-online-packages.yml
- type: Overlay
  url: overlays/numbers-online-openapi-overlay.yaml
- type: Conformance
  url: conformance/numbers-online-conformance.yml
- type: ErrorCatalog
  url: errors/numbers-online-problem-types.yml
- type: Lifecycle
  url: lifecycle/numbers-online-lifecycle.yml
- type: Deprecation
  url: lifecycle/numbers-online-lifecycle.yml
  name: Frozen-permanent-alias deprecation posture, stated in the OpenAPI at /api/spec
- type: Conventions
  url: conventions/numbers-online-conventions.yml
- type: Idempotency
  url: conventions/numbers-online-conventions.yml
  name: Idempotency-Key on lookup, batch lookup, scrub and SBC redirect (at-most-once billing; coverage partial)
- type: RateLimits
  url: rate-limits/numbers-online-rate-limits.yml
- type: Plans
  url: plans/numbers-online-plans-pricing.yml
- type: ChangeLog
  url: changelog/numbers-online-changelog.yml
- type: ChangeLog
  url: https://numbers.online/api/spec
  name: Version changelog table inside the OpenAPI description
- type: DataModel
  url: data-model/numbers-online-data-model.yml
- type: AgentSkill
  url: skills/_index.yml
- type: AgentSkill
  url: skills/numbers-online-inbound-caller-intelligence.md
  name: Assess an inbound caller and file a receipt-backed report
- type: AgentSkill
  url: skills/numbers-online-outbound-precall-scrub.md
  name: Scrub a destination before dialing and enrol your caller ID
- type: AgentSkill
  url: skills/numbers-online-pbx-caller-id.md
  name: Label inbound calls on a PBX or softphone
- type: AgentSkill
  url: skills/numbers-online-key-lifecycle.md
  name: Sign up, fund and rotate API keys safely


# --- truncated at 32 KB (32 KB total) ---
# Full source: https://raw.githubusercontent.com/api-evangelist/numbers-online/refs/heads/main/apis.yml

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