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 API contracts indexed 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 43 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

68.8/100 exemplar ▬ flat Agent 61/100 agent native Front door AI 2/6 trace saas Full breakdown ↓
scored 2026-10-17 · rubric v0.24.0

AccessFreemiumSelf serve⚡ Free to try

3 published contracts 1 MCP Servers

Email Verification DeliverabilityDisposable Email DetectionMX RecordsBulk Email ValidationData EnrichmentSyntax ValidationReverse Email LookupLogo APIA2A

What this lets a business do 1

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

Information & Data Management

BC-610

DeBounce Disposable Email Detector APIDeBounce Email Validation APIUpload

GET /v1/ GET / GET /v1/upload/

What people ask DeBounce 7

The questions people put to an LLM, and the jobs they hand an agent, that DeBounce's APIs answer — each one linked to the operation that does it. Generated by API Evangelist

DeBounce Usage API Get validation usage for a date range “How many email validations did I use last month?”

DeBounce Upload API Start bulk validation of an email list “How do I validate a whole CSV of email addresses at once?”

DeBounce Status API Check the status of a bulk validation list “Has my uploaded email list finished validating yet?”

DeBounce Reverse API Look up data associated with an email “Can I find out who is behind an email address?”

DeBounce Email Validation API Validate a single email address “How do I verify that one email address is deliverable before I send to it?”

DeBounce Disposable Email Detector API Check if an email or domain is disposable “Is there a free way to tell if a signup email is a throwaway address?”

DeBounce Account Management API Check remaining validation credits “How many DeBounce credits do I have left on my account?”

Kin Score

Kin Score How this is scored →
scored 2026-10-17 · rubric v0.24.0

Composite quality — 68.8/100 · exemplar

Contract Quality 11.4 / 21

Developer Ergonomics 11.7 / 17

Access Clarity 14.3 / 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

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 — jsonschema rules

5 rules · 4 warnings 1 info

SPECTRAL

3 actions · update · debounce-validation-api-openapi.yml

GENERATED

Scroll for all 12

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

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

AgentSkill

LLMsTxt

WellKnown

AgenticAccess

Design & Contract 8

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Conformance

DataModel

Components

Vocabulary

JSONLDContext

Scroll for all 8

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

PostmanWorkspace

ToolCrosswalk

Packages

Access & Security 4

Authentication, authorization, and security posture

Compliance

Authentication

OAuthScopes

DomainSecurity

Operate 6

Status, limits, changes, and where to get help

Support

StatusPage

Roadmap

ChangeLog

ChangeLog

RateLimits

Commercial 5

Pricing, plans, and the legal terms of use

Pricing

TermsOfService

PrivacyPolicy

Plans

FinOps

Company 4

The organization behind the API

Website

Website

Blog

Blog

LinkedIn

BlogPosts

BlogPosts

Other 8

Properties that don't map to a standard resource type

CapabilityMap

Overlay

Overlay

Overlay

Overlay

Overlay

AgentCard

Scroll for all 8

Source (apis.yml)

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: CapabilityMap
  url: capabilities/debounce-capability-edges.yml
  name: DeBounce Business Capability Map
- 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.'
x-a2a:
  verified: true
  probed: '2026-09-26'
  url: https://developers.debounce.com/.well-known/agent-card.json
  grade: conformant
  protocol_version: '0.3'
  control: 404

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