# FirstSales

**Canonical:** https://apis.io/providers/firstsales-io/  
**Website:** https://firstsales.io/  
**APIs profiled:** 1

FirstSales provides an AI‑powered cold email platform that lets users send unlimited cold emails from multiple mailboxes. The service includes AI agents that can find leads, draft personalized messages, and handle follow‑ups, as well as a warm‑up feature to improve deliverability. Pricing starts at $29 per month, and the platform integrates with popular CRMs and email providers. It aims to help sales teams scale outreach efficiently while maintaining compliance and deliverability best practices.

## Kin Score — 52.2 / 100 (developing)

Scored 2026-11-13 under rubric 0.28.0.

| Facet | Score |
|---|---|
| Discoverability | 67.9 |
| Contract Quality | 61.7 |
| Contract Governance | 22.0 |
| Operational Transparency | 33.3 |
| Developer Ergonomics | 61.3 |
| Access Clarity | 51.1 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 18.6 (matched via fallback).

## Agent readiness — 63.6 (agent-native)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | served |
| Idempotency | verified |
| Error Semantics | verified |
| OpenAPI Examples | partial |
| Rate Limit Signal | verified |
| Event Surface Described | no |
| Agent Skills | derived |
| Well Known Catalog | yes |
| Consent Identity | no |
| Agent Card | conformant |
| Dry Run Mode | no |
| Delegated Identity | served |
| Protected Resource Metadata | verified |
| Dynamic Client Registration | yes |
| Agentic Commerce | no |
| Pagination Ratio | na |
| Operation Distinctiveness | distinct |
| MCP Tool Quality | na |

## Access

Paid · Requires approval — onboarding: approval, pricing: paid, trial: no (confidence: high).

## APIs (7)

- **FirstSales Analyze API** — AI-assisted cold-email content analysis.
- **FirstSales DNS API** — DNS record and deliverability diagnostics.
- **FirstSales Domain API** — Domain intelligence (age, records, subdomains).
- **FirstSales Email API** — Email address validation and risk checks.
- **FirstSales Mail Tester API** — Temporary test inbox and received-email analysis.
- **FirstSales System API** — Service health.
- **FirstSales Tutorials API** — Public, no-auth tutorial content feed.

## Agentic access (1)

- **FirstSales Agentic Access** — 20 operations · 11 acting

## Security (2)

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

## Plans (1)

- **FirstSales Plans Pricing**

## Tags

AI outbound sales, Cold Email, Email Warm-up, Lead Generation

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