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 📡 Profile data on GitHub

4.5/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessNo public API

0 APIs

Company Biotechnology Pharmaceuticals Antibody-Drug ConjugatesBioconjugationDrug Discovery Oncology Life Sciences Healthcare South Korea

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 4.5/100 · 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 4.8 / 9

Regulatory Posture 0.7 / 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

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes

13 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 0.0 — up to +25.0 composite points
Developer Ergonomics scores 0.0 — up to +20.0 composite points
Access Clarity scores 0.0 — up to +20.0 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/abtis2772/apis.yml: open an issue on github.com/api-evangelist/abtis2772 to ask a question or point us at an artifact you publish. 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)

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
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  gated: private
  gated_source:
  - x-api-posture
  label: Unknown
  confidence: low
  probe_state: none
  source:
  - security
  generated: '2026-11-06'
  method: derived
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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