# Tailcall

**Canonical:** https://apis.io/providers/tailcall/  
**Website:** https://tailcall.run  
**APIs profiled:** 2

Tailcall is a high-performance GraphQL API gateway and runtime that lets developers compose multiple upstream REST, gRPC, and GraphQL APIs into a unified GraphQL schema. Built in Rust, it offers declarative configuration via .graphql files with directives for HTTP, caching, batching, and security controls. The open-source runtime (Apache 2.0) supports deployment on AWS Lambda, Cloudflare Workers, Docker, and bare metal. Tailcall Inc has subsequently shipped ForgeCode, a CLI coding harness built on the same performance-first ethos.

## Kin Score — 31.3 / 100 (thin)

Scored 2026-08-21 under rubric 0.12.0. Trend: flat (+0.0 from 31.3).

| Facet | Score |
|---|---|
| Discoverability | 68.5 |
| Contract Quality | 50.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 5.3 |
| Developer Ergonomics | 16.7 |
| Commercial Clarity | 39.5 |
| Access Clarity | 39.5 |

## Agent readiness — 18.4 (agent-aware)

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

## Access

Freemium — onboarding: unknown, pricing: freemium, trial: no (confidence: medium).

## APIs (2)

- **Tailcall GraphQL Runtime** — High-performance GraphQL runtime for composing multiple upstream REST, gRPC, and GraphQL APIs into a unified GraphQL schema. Configuration-driven via declarative .graphql files ...
- **ForgeCode API (Tailcall Inc)** — ForgeCode is the commercial CLI coding harness product from Tailcall Inc, positioned as an AI-enabled programming assistant supporting 300+ models (Claude, GPT, Grok, Gemini, De...

## Security (1)

- **Tailcall Domain Security** — TLSv1.3 · DNSSEC · DMARC

## Plans (1)

- **Tailcall Plans Pricing**

## Tags

GraphQL, API Gateway, GraphQL Runtime, REST, gRPC, Rust, Open-Source, API Composition, Caching, Batching

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