# Wunderkind

**Canonical:** https://apis.io/providers/wunderkind/  
**Website:** https://www.wunderkind.co  
**APIs profiled:** 7

Wunderkind (formerly BounceX) is a performance marketing and identity resolution platform that turns anonymous website and mobile-app traffic into triggered, one-to-one email and text messages. Its Autonomous Marketing Platform pairs an identity graph with AI decisioning, and its Build with Wunderkind developer surface exposes that machinery as APIs: an Identity API for device-ID-to-email resolution, an Event Ingestion API for server-side behavioral events, Email and Text Message send APIs, a UCRM subscribe and unsubscribe API, Signals webhooks that deliver behavioral triggers into ESPs like Klaviyo, Salesforce Marketing Cloud, Braze, and Bloomreach, plus Web and Mobile SDKs for Android, iOS, Flutter, and React Native.

## Kin Score — 54.8 / 100 (developing)

Scored 2026-08-17 under rubric 0.11.0. Trend: flat (+2.3 from 52.5).

| Facet | Score |
|---|---|
| Discoverability | 92.6 |
| Contract Quality | 61.7 |
| Governance | 11.5 |
| Operational Transparency | 65.8 |
| Developer Ergonomics | 62.5 |
| Commercial Clarity | 50.0 |

Regulatory layer — **Telecommunications**: 41.7 (matched via tags).

## Agent readiness — 57.0 (agent-ready)

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

## Access

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

## APIs (7)

- **Wunderkind Text Message API** — RESTful endpoints for delivering text messages from platforms external to the Wunderkind ecosystem (ESP, CDP, etc.): single and bulk sends of up to 50,000 messages per request, ...
- **Wunderkind Email API** — Email sending operations
- **Wunderkind Id Resolution API** — The Id Resolution API from Wunderkind — 3 operation(s) for id resolution.
- **Wunderkind Identity API** — The Identity API from Wunderkind — 2 operation(s) for identity.
- **Wunderkind Send Event API** — The Send Event API from Wunderkind — 11 operation(s) for send event.
- **Wunderkind Ucrm API** — The Ucrm API from Wunderkind — 2 operation(s) for ucrm.
- **Wunderkind Wunderhook API** — The Signals Wunderhook consumer contract — the single POST endpoint a client stands up to RECEIVE Wunderkind Signals webhook deliveries. The base URL is therefore templated and ...

## MCP servers (1)

- **wunderkind-mcp.yml**

## Agentic access (1)

- **Wunderkind Agentic Access** — 23 operations · 21 acting

## Security (3)

- **Wunderkind Authentication** — apiKey/http · 4 schemes
- **Wunderkind Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC
- **Wunderkind Trust Center** — SOC 2 Type 2, ISO 27001

## Plans (1)

- **Wunderkind Plans Pricing**

## Tags

Company, Marketing, Personalization, Identity Resolution, Email, SMS, Behavioral Data, eCommerce, Webhooks

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