NaviStone

NaviStone is a direct-mail marketing technology company that turns first-party and "unknown" website audiences into addressable postcard campaigns for consumer brands. Its platform helps businesses prospect (lookalike audiences), retain (mailing customers who opt out of digital channels), and retarget (postcards that amplify campaign performance), claiming up to a 70% increase in return on marketing spend. NaviStone's platform API (implemented on the Zazmic platform and published at docs.navistone.com) manages clients, website domains, audience segments, campaigns tied to Modern Postcard creative IDs, ZIP-code and state geo-targeting, and output tracking, all secured with an X-API-Key header. NaviStone is backed by Bullpen Capital and works with brands including Sleep Number, Vitamix, and Hey Dude across retail, travel, beauty, apparel, and home services.

NaviStone publishes 8 APIs on the APIs.io network, including API Info API, Campaigns API, Clients API, and 5 more. Tagged areas include Company, Marketing, Direct Mail, Advertising, and Customer Acquisition.

NaviStone’s developer surface includes documentation, API reference, engineering blog, signup flow, authentication, and 21 more developer resources.

🌐 Visit website 📡 Source on GitHub

36.2/100 thin ▬ flat Agent 26/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessApproval

1 APIs

Company Marketing Direct Mail Advertising Customer Acquisition Audience Targeting MarTech AdTech Postcards Retargeting

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 36.2/100 · thin

Contract Quality 10.4 / 23

Developer Ergonomics 7.6 / 18

Access Clarity 4.3 / 18

Operational Transparency 2.2 / 12

Contract Governance 2.0 / 11

Discoverability 6.8 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 26/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 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 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

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.

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/navistone: 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.

NaviStone API Info API

API information and endpoints

NaviStone Campaigns API

Campaign management

NaviStone Clients API

Client management

NaviStone Domains API

Domain management

NaviStone Geo Targeting API

Geographic targeting

NaviStone Health API

Health checks

NaviStone Output API

Output tracking

NaviStone Segments API

Audience segments

Scroll for all 8

Open Collections 9

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

API Collection

OPEN COLLECTION

Zazmic Platform API Info API

OPEN COLLECTION

Zazmic Platform API Info Campaigns API

OPEN COLLECTION

Zazmic Platform API Info Clients API

OPEN COLLECTION

Zazmic Platform API Info Domains API

OPEN COLLECTION

Zazmic Platform API Info Geo Targeting API

OPEN COLLECTION

Zazmic Platform API Info Health API

OPEN COLLECTION

Zazmic Platform API Info Output API

OPEN COLLECTION

Zazmic Platform API Info Segments API

OPEN COLLECTION

Scroll for all 9

Arazzo Workflows 1

Multi-step API workflows described with the Arazzo specification.

NaviStone campaign launch

Onboard a client, create a direct-mail campaign, add ZIP geo-targeting, and read output.

ARAZZO

Pricing Plans 1

Published pricing tiers and plan structures.

Navistone Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Navistone Rate Limits

0 limits

RATE LIMITS

Security Posture 2

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

Navistone Authentication

apiKey · 1 scheme

SECURITY

Navistone Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Navistone Agentic Access

36 operations · 20 acting · 20 human-in-the-loop

36 operations · 20 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

X-MCPServerCandidate

X-MCPServerCandidate

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

DataModel

Conformance

Lifecycle

Arazzo

Build 3

SDKs, sample code, and the tooling you integrate with

ToolCrosswalk

ToolCrosswalk

Packages

Packages

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

RateLimits

RateLimits

StatusPage

StatusPage

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

Plans

Plans

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: navistone
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: approval
  trial: false
  try_now: false
  public: false
  label: Requires approval
  confidence: medium
  source:
  - plans
  - authentication
  - rate-limits
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/navistone.png
name: NaviStone
description: NaviStone is a direct-mail marketing technology company that turns first-party and "unknown" website audiences
  into addressable postcard campaigns for consumer brands. Its platform helps businesses prospect (lookalike audiences), retain
  (mailing customers who opt out of digital channels), and retarget (postcards that amplify campaign performance), claiming
  up to a 70% increase in return on marketing spend. NaviStone's platform API (implemented on the Zazmic platform and published
  at docs.navistone.com) manages clients, website domains, audience segments, campaigns tied to Modern Postcard creative IDs,
  ZIP-code and state geo-targeting, and output tracking, all secured with an X-API-Key header. NaviStone is backed by Bullpen
  Capital and works with brands including Sleep Number, Vitamix, and Hey Dude across retail, travel, beauty, apparel, and
  home services.
url: https://raw.githubusercontent.com/api-evangelist/navistone/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- bullpen-capital
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-08-13'
tags:
- Company
- Marketing
- Direct Mail
- Advertising
- Customer Acquisition
- Audience Targeting
- MarTech
- AdTech
- Postcards
- Retargeting
apis:
- aid: navistone:navistone-api-info-api
  name: NaviStone API Info API
  description: API information and endpoints
  humanURL: https://docs.navistone.com
  baseURL: https://docs.navistone.com
  tags:
  - API Info
  properties:
  - type: OpenAPI
    url: openapi/navistone-api-info-api-openapi.yml
- aid: navistone:navistone-campaigns-api
  name: NaviStone Campaigns API
  description: Campaign management
  humanURL: https://docs.navistone.com
  baseURL: https://docs.navistone.com
  tags:
  - Campaigns
  properties:
  - type: OpenAPI
    url: openapi/navistone-campaigns-api-openapi.yml
- aid: navistone:navistone-clients-api
  name: NaviStone Clients API
  description: Client management
  humanURL: https://docs.navistone.com
  baseURL: https://docs.navistone.com
  tags:
  - Clients
  properties:
  - type: OpenAPI
    url: openapi/navistone-clients-api-openapi.yml
- aid: navistone:navistone-domains-api
  name: NaviStone Domains API
  description: Domain management
  humanURL: https://docs.navistone.com
  baseURL: https://docs.navistone.com
  tags:
  - Domains
  properties:
  - type: OpenAPI
    url: openapi/navistone-domains-api-openapi.yml
- aid: navistone:navistone-geo-targeting-api
  name: NaviStone Geo Targeting API
  description: Geographic targeting
  humanURL: https://docs.navistone.com
  baseURL: https://docs.navistone.com
  tags:
  - Geo-Targeting
  tags_raw:
  - Geo Targeting
  properties:
  - type: OpenAPI
    url: openapi/navistone-geo-targeting-api-openapi.yml
- aid: navistone:navistone-health-api
  name: NaviStone Health API
  description: Health checks
  humanURL: https://docs.navistone.com
  baseURL: https://docs.navistone.com
  tags:
  - Health
  properties:
  - type: OpenAPI
    url: openapi/navistone-health-api-openapi.yml
- aid: navistone:navistone-output-api
  name: NaviStone Output API
  description: Output tracking
  humanURL: https://docs.navistone.com
  baseURL: https://docs.navistone.com
  tags:
  - Output
  properties:
  - type: OpenAPI
    url: openapi/navistone-output-api-openapi.yml
- aid: navistone:navistone-segments-api
  name: NaviStone Segments API
  description: Audience segments
  humanURL: https://docs.navistone.com
  baseURL: https://docs.navistone.com
  tags:
  - Segments
  properties:
  - type: OpenAPI
    url: openapi/navistone-segments-api-openapi.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/navistone-agentic-access.yml
- type: Website
  url: https://www.navistone.com
- type: DeveloperPortal
  url: https://docs.navistone.com
- type: Documentation
  url: https://docs.navistone.com
- type: APIReference
  url: https://docs.navistone.com
- type: Blog
  url: https://www.navistone.com/blog
- type: SignUp
  url: https://www.navistone.com/get-started
- type: PrivacyPolicy
  url: https://www.navistone.com/privacy-policy
- type: Authentication
  url: authentication/navistone-authentication.yml
- type: DomainSecurity
  url: security/navistone-domain-security.yml
- type: Conventions
  url: conventions/navistone-conventions.yml
- type: ErrorCatalog
  url: errors/navistone-problem-types.yml
- type: DataModel
  url: data-model/navistone-data-model.yml
- type: Conformance
  url: conformance/navistone-conformance.yml
- type: Lifecycle
  url: lifecycle/navistone-lifecycle.yml
- type: X-MCPServerCandidate
  url: mcp/navistone-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: Overlay
  url: overlays/navistone-openapi-overlay.yaml
- type: LLMsTxt
  url: llms/navistone-llms.txt
- type: AgentSkill
  url: skills/_index.yml
- type: Arazzo
  name: NaviStone campaign launch
  url: arazzo/navistone-campaign-launch.yml
- type: ToolCrosswalk
  url: mcp/navistone-tool-crosswalk.yml
- type: Packages
  url: packages/navistone-packages.yml
- type: Plans
  url: plans/navistone-plans-pricing.yml
- type: RateLimits
  url: rate-limits/navistone-rate-limits.yml
- type: StatusPage
  url: https://status.navistone.com
- type: GitHubOrganization
  url: https://github.com/navistone
x-enrichment:
  date: '2026-08-13'
  status: enriched
  artifacts_added: 5
  pass: local-v1

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