DayOneLead

DayOneLead provides prospecting and outreach software that monitors newly registered businesses across multiple states, researches public contact information, and enables teams to run targeted cold email campaigns at scale. The platform automates lead discovery, data enrichment, and outreach workflows for sales and marketing professionals.

DayOneLead is listed with 1 API on the APIs.io network. Tagged areas include Business, Lead Generation, Sales Automation, Marketing, and Software-as-a-Service.

DayOneLead’s developer surface includes pricing, documentation, and 15 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

26.8/100 thin Agent 22/100 agent aware Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

1 API

Business Lead Generation Sales Automation Marketing Software-as-a-Service Company

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 26.8/100 · thin

Contract Quality 0.0 / 21

Developer Ergonomics 1.6 / 17

Access Clarity 11.2 / 17

Operational Transparency 1.7 / 11

Contract Governance 1.9 / 10

Discoverability 5.2 / 9

Regulatory Posture 3.7 / 15

Agent readiness — 22/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 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

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)

8 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 0.0 — up to +25.0 composite points
Developer Ergonomics scores 9.5 — up to +18.1 composite points
Operational Transparency scores 15.8 — up to +10.9 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/dayonelead-com/apis.yml: open an issue on github.com/api-evangelist/dayonelead-com to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 3

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Dynamic Client Registration

measured — observed by APIs.io (published)

APIs 1

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

DayOneLead API

API for DayOneLead prospecting and outreach platform

DayOneLead API pricing

Prices published by DayOneLead, read 2026-11-05 from dayonelead.com/pricing.

Plan	Price
Founder	$49/month
Team seats	$10/mo each

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Dayonelead Com Plans Pricing

2 plans

PLANS

Security Posture 1

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

Dayonelead Com Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Login

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Conformance

Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

Security

Security

DomainSecurity

DomainSecurity

Commercial 4

Pricing, plans, and the legal terms of use

Plans

TermsOfService

PrivacyPolicy

Pricing

Company 2

The organization behind the API

Newsroom

Newsroom

Website

Website

Other 3

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Leadership

Leadership

Source (apis.yml)

aid: dayonelead-com
name: DayOneLead
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: low
  probe_state: unreadable
  source:
  - plans
  - security
  generated: '2026-11-06'
  method: derived
image: https://dayonelead.com/opengraph-image?72a49326bb37561a
description: DayOneLead provides prospecting and outreach software that monitors newly registered businesses across multiple
  states, researches public contact information, and enables teams to run targeted cold email campaigns at scale. The platform
  automates lead discovery, data enrichment, and outreach workflows for sales and marketing professionals.
url: https://artifacts.apis.io/dayonelead-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-05 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-05'
modified: '2026-11-05'
tags:
- Business
- Lead Generation
- Sales Automation
- Marketing
- Software-as-a-Service
- Company
tags_raw:
- Business
- LeadGeneration
- SalesAutomation
- Marketing
- SaaS
- Company
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/dayonelead-com-plans-pricing.yml
- type: Conformance
  url: conformance/dayonelead-com-conformance.yml
- type: LLMsTxt
  url: llms/dayonelead-com-llms.txt
- type: WellKnown
  url: well-known/dayonelead-com-well-known.yml
- type: Hosts
  url: hosts/dayonelead-com-hosts.yml
- type: Vendors
  url: vendors/dayonelead-com-vendors.yml
- type: TermsOfService
  url: https://dayonelead.com/terms
- type: Security
  url: https://dayonelead.com/new-york/manhattan/security
- type: PrivacyPolicy
  url: https://dayonelead.com/privacy
- type: Pricing
  url: https://dayonelead.com/pricing
- type: Newsroom
  url: https://dayonelead.com/press
- type: Login
  url: https://dayonelead.com/login
- type: Leadership
  url: https://dayonelead.com/new-york/albany/management
- type: Documentation
  url: https://dayonelead.com/docs
- type: GitHubOrganization
  url: https://github.com/Dayonelead
- type: DomainSecurity
  url: security/dayonelead-com-domain-security.yml
- type: Website
  url: https://dayonelead.com/
apis:
- name: DayOneLead API
  description: API for DayOneLead prospecting and outreach platform
  humanURL: https://dayonelead.com/docs
  baseURL: null
  aid: dayonelead-com:dayonelead-api
x-coverage:
  state: unreadable
  reason: js-rendered-docs
  detail: Documentation pages are rendered via JavaScript, preventing machine-readable spec discovery.
  evidence:
  - url: https://dayonelead.com/docs
    status: 200
  checked: '2026-11-05'
x-enrichment:
  date: '2026-11-05'
  status: enriched
  artifacts_added: 13
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

DayOneLead API — frequently asked questions

Does DayOneLead have an API?

Yes. APIs.io lists 1 API from DayOneLead, including DayOneLead API.

How much does the DayOneLead API cost?

DayOneLead publishes its prices; its Founder plan is $49/month as of 2026-11-05. APIs.io lists 2 pricing plans for DayOneLead, with each plan's price, limits and inclusions under Pricing on this page.

Is the DayOneLead API ready for AI agents?

DayOneLead has a Kin Score of 26.8 out of 100 (thin) and an Agent Readiness score of 21.8 (agent-aware), scored by API Evangelist on 2026-11-06.

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get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
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