Newoldstamp

Newoldstamp is an email signature management platform that lets companies create, brand, and centrally manage professional email signatures across their teams. It provides a signature generator with customizable templates, department- and role-based signature deployment, email signature marketing banners and campaigns, click analytics, and integrations with Google Workspace, Microsoft 365, and popular email clients. Newoldstamp also operates Pearl Diver, a website-visitor identification product. Founded in 2016 and backed by 500 Global, it serves marketing, sales, and IT teams that want consistent branded email signatures at scale. The company exposes no public developer API surface at this time.

Newoldstamp is profiled on the APIs.io network. Tagged areas include Company, Email Signatures, Email Signature Management, Email Marketing, and Branding.

Newoldstamp’s developer surface includes pricing, engineering blog, support, signup flow, and 5 more developer resources.

🌐 Visit website 📡 Source on GitHub
17.0/100 emerging ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-28 · rubric v0.5
0 APIs
CompanyEmail SignaturesEmail Signature ManagementEmail MarketingBrandingSaaSProductivityWebsite Visitor Identification

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.5
Composite quality — 17.0/100 · emerging
Contract Quality 0.0 / 25
Developer Ergonomics 1.3 / 20
Commercial Clarity 8.9 / 20
Operational Transparency 0.0 / 13
Governance 0.0 / 12
Discoverability 6.8 / 10
Agent readiness — 0/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/newoldstamp: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Security Posture 1

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

Newoldstamp Domain Security

TLSv1.3

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

SignUp
SignUp
 Login
Login

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support
Support

Commercial 3

Pricing, plans, and the legal terms of use

Pricing
Pricing
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: newoldstamp
name: Newoldstamp
description: Newoldstamp is an email signature management platform that lets companies create, brand, and centrally manage
  professional email signatures across their teams. It provides a signature generator with customizable templates, department-
  and role-based signature deployment, email signature marketing banners and campaigns, click analytics, and integrations
  with Google Workspace, Microsoft 365, and popular email clients. Newoldstamp also operates Pearl Diver, a website-visitor
  identification product. Founded in 2016 and backed by 500 Global, it serves marketing, sales, and IT teams that want consistent
  branded email signatures at scale. The company exposes no public developer API surface at this time.
url: https://raw.githubusercontent.com/api-evangelist/newoldstamp/refs/heads/main/apis.yml
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://newoldstamp.com/images/logo-v4.svg
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Email Signatures
- Email Signature Management
- Email Marketing
- Branding
- SaaS
- Productivity
- Website Visitor Identification
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/newoldstamp-domain-security.yml
- type: Website
  url: https://newoldstamp.com
- type: Pricing
  url: https://newoldstamp.com/pricing/
- type: Blog
  url: https://newoldstamp.com/blog/
- type: Support
  url: https://support.newoldstamp.com/en/
- type: SignUp
  url: https://app.newoldstamp.com/sign-up
- type: Login
  url: https://app.newoldstamp.com/sign-in
- type: TermsOfService
  url: https://newoldstamp.com/terms-of-use/
- type: PrivacyPolicy
  url: https://newoldstamp.com/privacy/
x-enrichment:
  date: '2026-07-20'
  status: minimal
  artifacts_added: 1
  pass: local-v1