DeBounce website screenshot

DeBounce

DeBounce is an email validation and verification REST API that helps developers ensure the deliverability and quality of email addresses at scale. The API supports real-time single email validation, asynchronous bulk list processing, and data enrichment via reverse email lookup. It detects disposable addresses, role-based emails, catch-all domains, syntax errors, and performs MX record and SMTP-level mailbox verification. DeBounce offers pay-as-you-go credit-based pricing with no monthly subscription required, full API access at every tier, and credits that never expire. The surface is split across four hosts — api.debounce.io for validation, enrichment and account operations, bulk.debounce.io for asynchronous list jobs, disposable.debounce.io for the free disposable detector, and logo.debounce.com for the free company logo lookup — and DeBounce publishes OpenAPI 3.1.0, llms.txt, an A2A agent card, an agent skill and a remote MCP server from its developer portal.

DeBounce publishes 8 APIs on the APIs.io network, including Account Management API, Disposable Email Detector API, Email Validation API, and 5 more. Tagged areas include Email Verification, Deliverability, Disposable Email Detection, MX Records, and Bulk Email Validation.

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

DeBounce’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, pricing, signup flow, and 42 more developer resources.

🌐 Visit website 📡 Source on GitHub
70.4/100 exemplar ▬ flat Agent 61/100 agent native Front door AI 2/6 trace saas Full breakdown ↓
scored 2026-09-25 · rubric v0.23.0
AccessFreemiumSelf serve⚡ Free to try
3 APIs 1 MCP Servers
Email VerificationDeliverabilityDisposable Email DetectionMX RecordsBulk Email ValidationData EnrichmentSyntax ValidationReverse Email LookupLogo APIA2A

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-25 · rubric v0.23.0
Composite quality — 70.4/100 · exemplar
Contract Quality 11.4 / 21
Developer Ergonomics 11.7 / 17
Access Clarity 15.7 / 17
Operational Transparency 7.0 / 11
Contract Governance 4.3 / 10
Discoverability 6.8 / 9
Regulatory Posture 5.9 / 15
Agent readiness — 61/100 · agent native
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 6 / 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 0 / 8
Dry-Run / Simulate Mode 4 / 4
Delegated User Identity 6 / 6
Protected Resource Metadata 5 / 5
Registration Without a Human 6 / 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 does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.
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/.
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/debounce: 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 8

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

DeBounce Logo API

Free company logo lookup service positioned as a drop-in replacement for the deprecated Clearbit Logo API. A GET against logo.debounce.com with a company domain returns a high-q...

DeBounce Account Management API

The Account Management API from DeBounce — 1 operation(s) for account management.

DeBounce Disposable Email Detector API

The DeBounce Disposable Email Detector API API from DeBounce — 1 operation(s) for debounce disposable email detector api.

DeBounce Email Validation API

The DeBounce Email Validation API API from DeBounce — 1 operation(s) for debounce email validation api.

DeBounce Reverse API

The Reverse API from DeBounce — 1 operation(s) for reverse.

DeBounce Status API

The Status API from DeBounce — 1 operation(s) for status.

DeBounce Upload API

The Upload API from DeBounce — 1 operation(s) for upload.

DeBounce Usage API

The Usage API from DeBounce — 1 operation(s) for usage.

Scroll for all 8

Postman Collections 4

Ready-to-run Postman collections for exercising this provider's APIs.

DeBounce Email Validation Account API

POSTMAN

DeBounce Email Validation Account Bulk API

POSTMAN

DeBounce Email Validation Account Data API

POSTMAN

DeBounce Email Account Validation API

POSTMAN

Open Collections 6

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

API Collection

OPEN COLLECTION

DeBounce Email Validation API — Account

OPEN COLLECTION

DeBounce Bulk Email Validation API

OPEN COLLECTION

DeBounce Email Validation API — Data Enrichment

OPEN COLLECTION

DeBounce Disposable Email Detector API

OPEN COLLECTION

DeBounce Email Validation API — Single Validation

OPEN COLLECTION

MCP Servers 1

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

DeBounce MCP Server

DeBounce serves two Model Context Protocol endpoints from its own hosts. The developer-portal server is anonymous and answers tools/list live — its three tools are documentation...

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Debounce Plans Pricing

9 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Debounce Rate Limits

4 limits

RATE LIMITS

FinOps 1

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

Debounce Finops

FINOPS

Semantic Vocabularies 1

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

Debounce Context

14 classes · 32 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

DeBounce API Rules

5 rules · 4 warnings 1 info

SPECTRAL

JSON Schema 1

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

DeBounce Validation Result

3 properties

JSON SCHEMA

Examples 1

Example request and response payloads for these APIs.

Debounce Single Validation Example

9 fields

EXAMPLE

Security Posture 2

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

Debounce Authentication

apiKey · 1 scheme

SECURITY

Debounce Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Debounce Scopes

1 scope · authorizationCode

1 scopes

SCOPES

Agentic Access 1

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

Debounce Agentic Access

7 operations

7 operations · 0 acting

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted
 SignUp
SignUp
 Login
Login

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

MCPServer
MCPServer
 AgentSkill
AgentSkill
 LLMsTxt
LLMsTxt
 WellKnown
WellKnown
 AgenticAccess
AgenticAccess

Design & Contract 8

Pagination, idempotency, versioning, errors, and events

Conventions
Conventions
 ErrorCatalog
ErrorCatalog
 Lifecycle
Lifecycle
 Conformance
Conformance
 DataModel
DataModel
 Components
Components
 Vocabulary
Vocabulary
 JSONLDContext
JSONLDContext

Scroll for all 8

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 PostmanWorkspace
PostmanWorkspace
 ToolCrosswalk
ToolCrosswalk
 Packages
Packages

Access & Security 4

Authentication, authorization, and security posture

Compliance
Compliance
 Authentication
Authentication
 OAuthScopes
OAuthScopes
 DomainSecurity
DomainSecurity

Operate 6

Status, limits, changes, and where to get help

Support
Support
 StatusPage
StatusPage
 Roadmap
Roadmap
 ChangeLog
ChangeLog
 ChangeLog
ChangeLog
 RateLimits
RateLimits

Commercial 5

Pricing, plans, and the legal terms of use

Pricing
Pricing
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy
 Plans
Plans
 FinOps
FinOps

Company 4

The organization behind the API

Website
Website
 Blog
Blog
 LinkedIn
LinkedIn
 BlogPosts
BlogPosts

Other 7

Properties that don't map to a standard resource type

Overlay
Overlay
 Overlay
Overlay
 Overlay
Overlay
 Overlay
Overlay
 Overlay
Overlay
 X
X
 AgentCard
AgentCard

Scroll for all 7

Source (apis.yml)

apis.yml Raw ↑ 
aid: debounce
name: DeBounce
description: 'DeBounce is an email validation and verification REST API that helps developers ensure the deliverability and
  quality of email addresses at scale. The API supports real-time single email validation, asynchronous bulk list processing,
  and data enrichment via reverse email lookup. It detects disposable addresses, role-based emails, catch-all domains, syntax
  errors, and performs MX record and SMTP-level mailbox verification. DeBounce offers pay-as-you-go credit-based pricing with
  no monthly subscription required, full API access at every tier, and credits that never expire. The surface is split across
  four hosts — api.debounce.io for validation, enrichment and account operations, bulk.debounce.io for asynchronous list jobs,
  disposable.debounce.io for the free disposable detector, and logo.debounce.com for the free company logo lookup — and DeBounce
  publishes OpenAPI 3.1.0, llms.txt, an A2A agent card, an agent skill and a remote MCP server from its developer portal.

  '
type: Index
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/debounce.png
url: https://raw.githubusercontent.com/api-evangelist/debounce/refs/heads/main/apis.yml
created: '2026-06-12'
modified: '2026-09-16'
specificationVersion: '0.23'
x-docs-platform: mintlify
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-09-25
tags:
- Email Verification
- Deliverability
- Disposable Email Detection
- MX Records
- Bulk Email Validation
- Data Enrichment
- Syntax Validation
- Reverse Email Lookup
- Logo API
- A2A
tags_raw:
- Email Validation
- Email Verification
- Deliverability
- Disposable Email Detection
- MX Records
- Bulk Email Validation
- Data Enrichment
- Syntax Validation
- Reverse Email Lookup
- Logo API
- A2A
apis:
- aid: debounce:debounce-logo-api
  name: DeBounce Logo API
  description: Free company logo lookup service positioned as a drop-in replacement for the deprecated Clearbit Logo API.
    A GET against logo.debounce.com with a company domain returns a high-quality PNG logo served from DeBounce's CDN, falling
    back to a generated monogram when no logo is available. No API key, no credits and no attribution are required.
  humanURL: https://developers.debounce.com/api-reference/endpoint/free/logo-api
  baseURL: https://logo.debounce.com
  tags:
  - Logo
  - Free
  properties:
  - type: Documentation
    url: https://developers.debounce.com/api-reference/endpoint/free/logo-api
  - type: APIReference
    url: https://developers.debounce.com/api-reference/endpoint/free/logo-api
  - type: Website
    url: https://debounce.com/logo-api/
- aid: debounce:debounce-account-management-api
  name: DeBounce Account Management API
  description: The Account Management API from DeBounce — 1 operation(s) for account management.
  humanURL: https://developers.debounce.com/api-reference/endpoint/single-validation
  baseURL: https://api.debounce.io
  tags:
  - Account Management
  properties:
  - type: OpenAPI
    url: openapi/debounce-account-management-api-openapi.yml
- aid: debounce:debounce-debounce-disposable-email-detector-api-api
  name: DeBounce Disposable Email Detector API
  description: The DeBounce Disposable Email Detector API API from DeBounce — 1 operation(s) for debounce disposable email
    detector api.
  humanURL: https://developers.debounce.com/api-reference/endpoint/single-validation
  baseURL: https://api.debounce.io
  tags:
  - DeBounce Disposable Email Detector API
  properties:
  - type: OpenAPI
    url: openapi/debounce-debounce-disposable-email-detector-api-api-openapi.yml
- aid: debounce:debounce-debounce-email-validation-api-api
  name: DeBounce Email Validation API
  description: The DeBounce Email Validation API API from DeBounce — 1 operation(s) for debounce email validation api.
  humanURL: https://developers.debounce.com/api-reference/endpoint/single-validation
  baseURL: https://api.debounce.io
  tags:
  - DeBounce Email Validation API
  properties:
  - type: OpenAPI
    url: openapi/debounce-debounce-email-validation-api-api-openapi.yml
- aid: debounce:debounce-reverse-api
  name: DeBounce Reverse API
  description: The Reverse API from DeBounce — 1 operation(s) for reverse.
  humanURL: https://developers.debounce.com/api-reference/endpoint/single-validation
  baseURL: https://api.debounce.io
  tags:
  - Reverse
  properties:
  - type: OpenAPI
    url: openapi/debounce-reverse-api-openapi.yml
- aid: debounce:debounce-status-api
  name: DeBounce Status API
  description: The Status API from DeBounce — 1 operation(s) for status.
  humanURL: https://developers.debounce.com/api-reference/endpoint/single-validation
  baseURL: https://api.debounce.io
  tags:
  - Status
  properties:
  - type: OpenAPI
    url: openapi/debounce-status-api-openapi.yml
- aid: debounce:debounce-upload-api
  name: DeBounce Upload API
  description: The Upload API from DeBounce — 1 operation(s) for upload.
  humanURL: https://developers.debounce.com/api-reference/endpoint/single-validation
  baseURL: https://api.debounce.io
  tags:
  - Upload
  properties:
  - type: OpenAPI
    url: openapi/debounce-upload-api-openapi.yml
- aid: debounce:debounce-usage-api
  name: DeBounce Usage API
  description: The Usage API from DeBounce — 1 operation(s) for usage.
  humanURL: https://developers.debounce.com/api-reference/endpoint/single-validation
  baseURL: https://api.debounce.io
  tags:
  - Usage
  properties:
  - type: OpenAPI
    url: openapi/debounce-usage-api-openapi.yml
common:
- type: Overlay
  url: overlays/debounce-validation-api-overlay.yaml
- type: Overlay
  url: overlays/debounce-bulk-api-overlay.yaml
- type: Overlay
  url: overlays/debounce-data-api-overlay.yaml
- type: Overlay
  url: overlays/debounce-account-api-overlay.yaml
- type: Overlay
  url: overlays/debounce-disposable-api-overlay.yaml
- type: Website
  url: https://debounce.com/
- type: DeveloperPortal
  url: https://developers.debounce.com/
- type: Documentation
  url: https://developers.debounce.com/
- type: APIReference
  url: https://developers.debounce.com/api-reference/endpoint/single-validation
- type: GettingStarted
  url: https://developers.debounce.com/
- type: Support
  url: https://help.debounce.com/
- type: Blog
  url: https://debounce.com/blog/
- type: Pricing
  url: https://debounce.com/pricing/
- type: SignUp
  url: https://app.debounce.com/register
- type: Login
  url: https://app.debounce.com/login
- type: TermsOfService
  url: https://debounce.com/terms-of-use/
- type: PrivacyPolicy
  url: https://debounce.com/privacy-policy/
- type: Compliance
  url: https://debounce.com/gdpr/
- type: StatusPage
  url: https://status.debounce.com/
- type: Roadmap
  url: https://feedback.debounce.com/roadmap
- type: ChangeLog
  url: https://feedback.debounce.com/changelog
- type: GitHubOrganization
  url: https://github.com/debounceio
- type: LinkedIn
  url: https://www.linkedin.com/company/debounceio
- type: X
  url: https://x.com/debounceio
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/debounce/overview
- type: AgentCard
  url: a2a/debounce-a2a.yml
- type: MCPServer
  url: mcp/debounce-mcp.yml
- type: ToolCrosswalk
  url: mcp/debounce-tool-crosswalk.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/debounce-llms.txt
- type: WellKnown
  url: well-known/debounce-well-known.yml
- type: AgenticAccess
  url: agentic-access/debounce-agentic-access.yml
- type: Authentication
  url: authentication/debounce-authentication.yml
- type: OAuthScopes
  url: scopes/debounce-scopes.yml
- type: Conventions
  url: conventions/debounce-conventions.yml
- type: ErrorCatalog
  url: errors/debounce-problem-types.yml
- type: Lifecycle
  url: lifecycle/debounce-lifecycle.yml
- type: Conformance
  url: conformance/debounce-conformance.yml
- type: DataModel
  url: data-model/debounce-data-model.yml
- type: Components
  url: components/debounce-components.yml
- type: Packages
  url: packages/debounce-packages.yml
- type: ChangeLog
  url: changelog/debounce-changelog.yml
- type: DomainSecurity
  url: security/debounce-domain-security.yml
- type: Plans
  url: plans/debounce-plans-pricing.yml
- type: RateLimits
  url: rate-limits/debounce-rate-limits.yml
- type: FinOps
  url: finops/debounce-finops.yml
- type: Vocabulary
  url: vocabulary/debounce-vocabulary.yml
- type: JSONLDContext
  url: json-ld/debounce-context.jsonld
- type: BlogPosts
  url: blogs/blogs.json
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-enrichment:
  date: '2026-08-14'
  status: enriched
  artifacts_added: 28
  pass: local-v1
  note: 'STEP 0b contract discovery found three real provider-published OpenAPI 3.1.0 documents linked from https://developers.debounce.com/llms.txt.
    They replaced a scaffolded spec that described endpoints DeBounce does not serve (/v1/bulk/ and /v1/disposable/ on api.debounce.io);
    the superseded file is archived under openapi/_original/_superseded/. Also found: a conformant A2A agent card, a provider-published
    Agent Skill, two live MCP endpoints, two llms.txt files, and OAuth 2.0 / OIDC / protected-resource metadata.'

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