Strand AI

Strand AI (YC W26) builds multimodal foundation models for spatial biology that predict missing patient bio-data from the data a patient already has. Its Lattice model turns a single H&E-stained whole-slide image into per-pixel predictions for a panel of protein markers, recovering spatial protein signal without running multiplex immunofluorescence. The Strand Platform API is a production REST surface (https://app.strandai.com/api/v1) for uploading whole-slide images, estimating and submitting Lattice inference jobs, streaming job status over Server-Sent Events, and downloading OME-Zarr results as AnnData (Python) or SpatialExperiment (R). Access is invite-only, authenticated with organization-scoped bearer API keys, and metered in credits (1 credit per 224x224-px patch per marker). Official Python (strand-sdk) and R (strandai) clients are published. Outputs are for research and hypothesis generation, not clinical use.

Strand AI publishes 4 APIs on the APIs.io network, including Jobs API, Predict API, Samples API, and 1 more. Tagged areas include Company, Artificial Intelligence, Machine Learning, Life Sciences, and Spatial Biology.

Strand AI’s developer surface includes documentation, API reference, getting-started guide, pricing, signup flow, authentication, changelog, and 17 more developer resources.

43.9/100 thin ▬ flat Agent 65/100 agent native Full breakdown ↓
scored 2026-07-27 · rubric v0.5
AccessSelf serve
4 APIs 1 MCP Servers
CompanyArtificial IntelligenceMachine LearningLife SciencesSpatial BiologyBioinformaticsDrug DiscoveryFoundation ModelsDigital PathologyHealthcare

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 43.9/100 · thin
Contract Quality 13.2 / 25
Developer Ergonomics 13.5 / 20
Commercial Clarity 4.7 / 20
Operational Transparency 3.8 / 13
Governance 0.0 / 12
Discoverability 10.0 / 10
Agent readiness — 65/100 · agent native
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 5 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/strand-ai: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 4

Individual APIs this provider publishes, each with its own machine-readable definition.

Strand AI Jobs API

The Jobs API from Strand AI — 4 operation(s) for jobs.

Strand AI Predict API

The Predict API from Strand AI — 2 operation(s) for predict.

Strand AI Samples API

The Samples API from Strand AI — 3 operation(s) for samples.

Strand AI Uploads API

The Uploads API from Strand AI — 2 operation(s) for uploads.

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

strand-ai-mcp.yml

MCP SERVER

Security Posture 2

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

Strand Ai Authentication

http · 1 scheme

SECURITY

Strand Ai Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Strand Ai Agentic Access

11 operations · 7 acting

11 operations · 7 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

Documentation 2

Reference material describing how the API behaves

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Build 3

SDKs, sample code, and the tooling you integrate with

Access & Security 2

Authentication, authorization, and security posture

Operate 2

Status, limits, changes, and where to get help

Commercial 1

Pricing, plans, and the legal terms of use

Company 1

The organization behind the API

Other 1

Properties that don't map to a standard resource type

Source (apis.yml)

apis.yml Raw ↑
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 16
  pass: local-v1
aid: strand-ai
name: Strand AI
description: Strand AI (YC W26) builds multimodal foundation models for spatial biology that predict missing patient bio-data
  from the data a patient already has. Its Lattice model turns a single H&E-stained whole-slide image into per-pixel predictions
  for a panel of protein markers, recovering spatial protein signal without running multiplex immunofluorescence. The Strand
  Platform API is a production REST surface (https://app.strandai.com/api/v1) for uploading whole-slide images, estimating
  and submitting Lattice inference jobs, streaming job status over Server-Sent Events, and downloading OME-Zarr results as
  AnnData (Python) or SpatialExperiment (R). Access is invite-only, authenticated with organization-scoped bearer API keys,
  and metered in credits (1 credit per 224x224-px patch per marker). Official Python (strand-sdk) and R (strandai) clients
  are published. Outputs are for research and hypothesis generation, not clinical use.
url: https://raw.githubusercontent.com/api-evangelist/strand-ai/refs/heads/main/apis.yml
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://avatars.githubusercontent.com/u/252118542?v=4
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: enriched
x-tier-reason: has-public-api
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Artificial Intelligence
- Machine Learning
- Life Sciences
- Spatial Biology
- Bioinformatics
- Drug Discovery
- Foundation Models
- Digital Pathology
- Healthcare
apis:
- aid: strand-ai:strand-ai-jobs-api
  name: Strand AI Jobs API
  description: The Jobs API from Strand AI — 4 operation(s) for jobs.
  humanURL: https://docs.strandai.com/api/overview
  baseURL: https://app.strandai.com/api/v1
  tags:
  - Jobs
  properties:
  - type: OpenAPI
    url: openapi/strand-ai-jobs-api-openapi.yml
  - type: Documentation
    url: https://docs.strandai.com/api/overview
  - type: APIReference
    url: https://docs.strandai.com/api-reference/endpoint/submitPrediction
- aid: strand-ai:strand-ai-predict-api
  name: Strand AI Predict API
  description: The Predict API from Strand AI — 2 operation(s) for predict.
  humanURL: https://docs.strandai.com/api/overview
  baseURL: https://app.strandai.com/api/v1
  tags:
  - Predict
  properties:
  - type: OpenAPI
    url: openapi/strand-ai-predict-api-openapi.yml
  - type: Documentation
    url: https://docs.strandai.com/api/overview
  - type: APIReference
    url: https://docs.strandai.com/api-reference/endpoint/submitPrediction
- aid: strand-ai:strand-ai-samples-api
  name: Strand AI Samples API
  description: The Samples API from Strand AI — 3 operation(s) for samples.
  humanURL: https://docs.strandai.com/api/overview
  baseURL: https://app.strandai.com/api/v1
  tags:
  - Samples
  properties:
  - type: OpenAPI
    url: openapi/strand-ai-samples-api-openapi.yml
  - type: Documentation
    url: https://docs.strandai.com/api/overview
  - type: APIReference
    url: https://docs.strandai.com/api-reference/endpoint/submitPrediction
- aid: strand-ai:strand-ai-uploads-api
  name: Strand AI Uploads API
  description: The Uploads API from Strand AI — 2 operation(s) for uploads.
  humanURL: https://docs.strandai.com/api/overview
  baseURL: https://app.strandai.com/api/v1
  tags:
  - Uploads
  properties:
  - type: OpenAPI
    url: openapi/strand-ai-uploads-api-openapi.yml
  - type: Documentation
    url: https://docs.strandai.com/api/overview
  - type: APIReference
    url: https://docs.strandai.com/api-reference/endpoint/submitPrediction
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DeveloperPortal
  url: https://docs.strandai.com
- type: Documentation
  url: https://docs.strandai.com/introduction
- type: APIReference
  url: https://docs.strandai.com/api-reference/openapi.json
- type: GettingStarted
  url: https://docs.strandai.com/quickstart
- type: Pricing
  url: https://docs.strandai.com/pricing
- type: SignUp
  url: https://app.strandai.com/sign-in?requestAccess
- type: GitHubOrganization
  url: https://github.com/Strand-AI
- type: Website
  url: https://strandai.com
- type: LLMsTxt
  url: llms/strand-ai-llms.txt
- type: Authentication
  url: authentication/strand-ai-authentication.yml
- type: DomainSecurity
  url: security/strand-ai-domain-security.yml
- type: AgenticAccess
  url: agentic-access/strand-ai-agentic-access.yml
- type: Packages
  url: packages/strand-ai-packages.yml
- type: SDKs
  url: packages/strand-ai-packages.yml
- type: MCPServer
  url: mcp/strand-ai-mcp.yml
- type: Overlay
  url: overlays/strand-ai-platform-overlay.yaml
- type: Conformance
  url: conformance/strand-ai-conformance.yml
- type: ErrorCatalog
  url: errors/strand-ai-problem-types.yml
- type: Lifecycle
  url: lifecycle/strand-ai-lifecycle.yml
- type: Deprecation
  url: lifecycle/strand-ai-lifecycle.yml
- type: Conventions
  url: conventions/strand-ai-conventions.yml
- type: ChangeLog
  url: changelog/strand-ai-changelog.yml
- type: DataModel
  url: data-model/strand-ai-data-model.yml
- type: AgentSkill
  url: skills/_index.yml