AbTis

AbTis Co., Ltd. (앱티스) is a South Korean biotechnology company founded in 2016 and headquartered in Yongin-si, Gyeonggi-do, inside the Dong-A Socio Holdings R&D Center. It develops AbClick, a third-generation site-selective antibody conjugation platform that attaches payloads to the Fc Lys248 residue of native IgG antibodies with no enzyme and no Fc engineering, giving a controlled drug-to-antibody ratio and batch-to-batch consistency across ADC, DAC, AOC, ARC, ISAC and dual-payload designs. AbTis licenses the platform, runs collaborative research and fee-for-service ADC development, and advances its own pipeline led by AT-211, a Claudin 18.2-targeting MMAE ADC. Acquired by Dong-A ST in 2023, it now operates as that company's ADC-specialised subsidiary. Its product is licensed chemistry and drug intellectual property, not software: it runs no developer program, public API, SDK or machine-readable contract.

AbTis is profiled on the APIs.io network. Tagged areas include Company, Biotechnology, Pharmaceuticals, Antibody-Drug Conjugates, and Bioconjugation.

🌐 Visit website 📡 Source on GitHub
4.1/100 minimal Agent 0/100 human only Full breakdown ↓
scored 2026-09-06 · rubric v0.19.0
0 APIs
CompanyBiotechnologyPharmaceuticalsAntibody-Drug ConjugatesBioconjugationDrug DiscoveryOncologyLife SciencesHealthcareSouth Korea

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-06 · rubric v0.19.0
Composite quality — 4.1/100 · minimal
Contract Quality 0.0 / 21
Developer Ergonomics 0.0 / 17
Access Clarity 0.0 / 17
Operational Transparency 0.0 / 11
Contract Governance 0.0 / 10
Discoverability 4.9 / 9
Regulatory Posture 1.1 / 15
Agent readiness — 0/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 0 / 6
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Delegated User Identity 0 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 0 / 6
Agentic Commerce Well-Known Document 0 / 5
Regulatory Posture applies to this provider. Its tags matched the Health regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.
The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/abtis2772: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Abtis2772 Domain Security

TLSv1.2

SECURITY

Resources

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt
LLMsTxt

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Contact
Contact
 PressReleases
PressReleases

Company 2

The organization behind the API

Website
Website
 About
About

Other 1

Properties that don't map to a standard resource type

SecondaryMarket
SecondaryMarket

Source (apis.yml)

apis.yml Raw ↑ 
aid: abtis2772
name: AbTis
description: 'AbTis Co., Ltd. (앱티스) is a South Korean biotechnology company founded in 2016 and headquartered in Yongin-si,
  Gyeonggi-do, inside the Dong-A Socio Holdings R&D Center. It develops AbClick, a third-generation site-selective antibody
  conjugation platform that attaches payloads to the Fc Lys248 residue of native IgG antibodies with no enzyme and no Fc engineering,
  giving a controlled drug-to-antibody ratio and batch-to-batch consistency across ADC, DAC, AOC, ARC, ISAC and dual-payload
  designs. AbTis licenses the platform, runs collaborative research and fee-for-service ADC development, and advances its
  own pipeline led by AT-211, a Claudin 18.2-targeting MMAE ADC. Acquired by Dong-A ST in 2023, it now operates as that company''s
  ADC-specialised subsidiary. Its product is licensed chemistry and drug intellectual property, not software: it runs no developer
  program, public API, SDK or machine-readable contract.'
url: https://raw.githubusercontent.com/api-evangelist/abtis2772/refs/heads/main/apis.yml
image: https://abtis.co.kr/assets/favicon/favicon-96x96.png
x-type: company
x-source: harvest:secondary-market
x-harvest-source-url: https://equityzen.com/company/abtis2772/
x-tier: stub
x-tier-reason: harvest
x-legal-name: AbTis Co., Ltd.
x-parent-company: Dong-A ST
x-api-posture: no-product-api
x-api-posture-basis: observed
x-api-posture-note: AbTis licenses ADC linker chemistry and sells laboratory services; its only web property is a gnuboard5
  corporate marketing site at abtis.co.kr whose entire navigation is Company, Science, Business and News. No developer portal,
  API reference, OpenAPI, GraphQL, AsyncAPI, MCP server or agent card exists on any host it controls, no package named abtis
  is published to npm or PyPI, and github.com/abtis is an unrelated individual account, not a company organization.
specificationVersion: '0.20'
created: '2026-09-06'
modified: '2026-09-06'
tags:
- Company
- Biotechnology
- Pharmaceuticals
- Antibody-Drug Conjugates
- Bioconjugation
- Drug Discovery
- Oncology
- Life Sciences
- Healthcare
- South Korea
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/abtis2772-domain-security.yml
- type: LLMsTxt
  url: llms/abtis2772-llms.txt
- type: Website
  url: https://abtis.co.kr/en/
- type: SecondaryMarket
  url: https://equityzen.com/company/abtis2772/
- type: About
  url: https://abtis.co.kr/en/company/overview.php
- type: Contact
  url: https://abtis.co.kr/en/company/contact.php
- type: PressReleases
  url: https://abtis.co.kr/en/pr-center/press-release.php
x-enrichment:
  date: '2026-09-06'
  status: minimal
  artifacts_added: 3
  pass: local-v3
x-coverage:
  state: none
  reason: not-a-software-company
  detail: 'AbTis sells ADC linker chemistry — AbClick platform licences, collaborative research and fee-for-service conjugation
    work — so there is no software product to expose: its only web property is a gnuboard5 corporate site whose entire navigation
    is Company, Science, Business and News, and behind the site''s CUPID JavaScript cookie challenge (which answers HTTP 200
    with a ~780-byte script on every path, then the real status on the cookied retry) /openapi.json, /swagger.json, /api-docs,
    /graphql, /llms.txt, /robots.txt, /sitemap.xml and all eight /.well-known/ paths return a genuine Apache 404.'
  evidence:
  - url: https://abtis.co.kr/en/
    status: 200
  - url: https://abtis.co.kr/openapi.json
    status: 404
  - url: https://abtis.co.kr/swagger.json
    status: 404
  - url: https://abtis.co.kr/graphql
    status: 404
  - url: https://abtis.co.kr/.well-known/agent-card.json
    status: 404
  - url: https://abtis.co.kr/.well-known/api-catalog
    status: 404
  - url: https://abtis.co.kr/llms.txt
    status: 404
  - url: https://www.abtis.co.kr/openapi.json
    status: 403
  - url: https://registry.npmjs.org/-/v1/search?text=abtis
    status: 200
  checked: '2026-09-06'

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