# NaviStone

**Canonical:** https://apis.io/providers/navistone/  
**Website:** https://www.navistone.com  
**APIs profiled:** 8

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.

## Kin Score — 36.9 / 100 (thin)

Scored 2026-08-17 under rubric 0.11.0. Trend: flat (+2.7 from 34.2).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 46.9 |
| Governance | 11.5 |
| Operational Transparency | 21.1 |
| Developer Ergonomics | 40.8 |
| Commercial Clarity | 23.7 |

## Agent readiness — 41.2 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| MCP Server | derived |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | partial |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium).

## APIs (8)

- **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

## MCP servers (1)

- **navistone-mcp.yml**

## Agentic access (1)

- **Navistone Agentic Access** — 36 operations · 20 acting · 20 human-in-the-loop

## Security (2)

- **Navistone Authentication** — apiKey · 1 scheme
- **Navistone Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Navistone Plans Pricing**

## Tags

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

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/navistone/). Scores are computed from the provider's own public artifacts under a published rubric.