# Inflection.io

**Canonical:** https://apis.io/providers/inflectionio/  
**Website:** https://www.inflection.io  
**APIs profiled:** 6

Inflection.io is a B2B marketing automation platform positioned as a modern, AI-native replacement for legacy tools like Marketo. It unifies target accounts, product users, customers, and leads with product-usage, sales, and behavioral signals so marketing teams can build audiences, draft campaigns, map customer journeys, score accounts, and report to the CMO — executing in minutes rather than weeks. The Inflection Developer API is a JSON-over-HTTPS REST API (OpenAPI 3.1, base https://api.inflection.io/v1) for reading and writing the people in a workspace: their profiles, product and marketing activity, static lists, emails, and per-contact personalized email versions, authenticated with scoped Personal Access Tokens or an OAuth 2.1 connected app. Alongside it Inflection runs a first-party remote MCP server at mcp.inflection.io — OAuth 2.1 with PKCE, its own trust and security page — that exposes the authoring surface the REST API does not: journeys, audiences, segments, tokens and analytics, driven by specialist agents. Surfaced as a version-one-ventures portfolio company and enriched from the provider's public developer, agent, and trust surfaces.

## Kin Score — 63.0 / 100 (strong)

Scored 2026-08-17 under rubric 0.11.0. Trend: rising (+18.2 from 44.8).

| Facet | Score |
|---|---|
| Discoverability | 92.6 |
| Contract Quality | 67.8 |
| Governance | 11.5 |
| Operational Transparency | 60.5 |
| Developer Ergonomics | 56.0 |
| Commercial Clarity | 81.6 |

## Agent readiness — 48.4 (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 | yes |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | flavored |
| Dry Run Mode | no |

## Access

Annual contract, MMC-metered, published price ladder — onboarding: unknown, pricing: unknown, trial: no (confidence: high).

## APIs (6)

- **Inflection.io Contact Activity API** — The Contact Activity API from Inflection.io — 4 operation(s) for contact activity.
- **Inflection.io Contacts API** — The Contacts API from Inflection.io — 6 operation(s) for contacts.
- **Inflection.io Emails API** — The Emails API from Inflection.io — 2 operation(s) for creating and reading HTML emails.
- **Inflection.io Email Versions API** — The Email Versions API from Inflection.io — 1 operation for pushing a per-contact personalized version of a Personalized Email Asset.
- **Inflection.io Lists and Members API** — The Lists and Members API from Inflection.io — 7 operation(s) for lists and members.
- **Inflection MCP** — Inflection's first-party remote MCP server — the agent-facing authoring surface for journeys, audiences, segments, emails, tokens and analytics, gated by OAuth 2.1 with PKCE.

## MCP servers (1)

- **inflectionio-mcp.yml**

## Agentic access (1)

- **Inflectionio Agentic Access** — 20 operations · 10 acting

## Security (4)

- **Inflectionio Authentication** — http/oauth2 · 2 schemes
- **Inflectionio Domain Security** — TLSv1.3 · DMARC
- **Inflectionio Vulnerability Disclosure** — contact published
- **Inflectionio Trust Center** — SOC 2, GDPR, CCPA, Penetration test

## Plans (1)

- **Inflectionio Plans Pricing**

## Tags

Company, Saas, Marketing, Marketing Automation, Email Marketing, Customer Data, B2B, Contacts, API, MCP, Agents, Artificial Intelligence, Customer Journeys, Webhooks

---

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