# Defiance International

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

Defiance International (defianceinternational.io) is an online supplier of research-use-only (RUO) chemical sequences and peptides that pairs each released lot with a checkable Certificate of Analysis record, including purity by HPLC, and a lot verifier at /coa/verify. Alongside its catalog, research library, trust center and journal, it publishes machine-readable data for agents -- an llms.txt index, an AI index of JSON catalog, sequence, evidence and policy documents, an OpenAPI description at /ai/openapi.json, and a read-only public Model Context Protocol endpoint at /mcp.

## Kin Score — 40.7 / 100 (developing)

Scored 2026-11-06 under rubric 0.27.0.

| Facet | Score |
|---|---|
| Discoverability | 71.7 |
| Contract Quality | 55.9 |
| Contract Governance | 22.0 |
| Operational Transparency | 15.8 |
| Developer Ergonomics | 30.4 |
| Access Clarity | 28.9 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 35.3 (matched via fallback).

## Agent readiness — 35.7 (agent-ready)

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

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## APIs (7)

- **Defiance International Catalog API** — The catalog API from Defiance International — 20 operation(s) for catalog.
- **Defiance International Content API** — The content API from Defiance International — 12 operation(s) for content.
- **Defiance International Documents API** — The documents API from Defiance International — 22 operation(s) for documents.
- **Defiance International Machine Documents API** — The machine-documents API from Defiance International — 10 operation(s) for machine-documents.
- **Defiance International Platform API** — The platform API from Defiance International — 10 operation(s) for platform.
- **Defiance International Research Register API** — The research-register API from Defiance International — 4 operation(s) for research-register.
- **Defiance International Studies API** — The studies API from Defiance International — 3 operation(s) for studies.

## MCP servers (1)

- **Defiance International MCP Server** — Remote MCP server at defianceinternational.io; 5 tools listed.

## Agentic access (1)

- **Defianceinternational Io Agentic Access** — 81 operations

## Security (3)

- **Defianceinternational Io Authentication** — 1 scheme
- **Defianceinternational Io Domain Security** — TLSv1.3 · HSTS · DMARC
- **Defianceinternational Io Vulnerability Disclosure** — security.txt · contact published

## Plans (1)

- **Defianceinternational Io Plans Pricing**

## Tags

Company, Research Chemicals, Peptides, Certificate of Analysis, Laboratory Supplies, E-Commerce, MCP

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