First Street

First Street is the physical climate risk data and analytics company behind the Risk Factor property reports, acquired by MSCI on 2026-08-03. It models flood, wildfire, wind, heat, cold, drought and air quality at property level anywhere on Earth using peer-reviewed, physics-based methods rather than historical claims data, and exposes that model through three APIs: a global Climate Risk GraphQL API, an Enterprise GraphQL API for portfolio-level exposure, scenario analysis and adaptation cost-benefit, and a Raster Map tile API for visualising perils on a map. It also runs a hosted MCP server so agents can query property climate risk directly. Access to every surface, and to individual fields within the GraphQL schemas, is granted by contract.

First Street publishes 7 APIs on the APIs.io network, including Enterprise API, Maps API, Graph QL API, and 4 more. Tagged areas include Climate, Risk Management, Environment, Modeling, and Geospatial.

First Street’s developer surface includes authentication, documentation, changelog, sandbox, API reference, getting-started guide, support, and 31 more developer resources.

🌐 Visit website 📡 Source on GitHub

56.5/100 strong ▬ flat Agent 35/100 agent ready Front door AI 1/6 silent Full breakdown ↓
scored 2026-09-25 · rubric v0.23.0

1 APIs 1 MCP Servers

Climate Risk Management Environment Modeling Geospatial Insurance Real Estate Data GraphQL Mapping

Kin Score

Kin Score How this is scored →
scored 2026-09-25 · rubric v0.23.0

Composite quality — 56.5/100 · strong

Contract Quality 9.8 / 19

Developer Ergonomics 11.0 / 15

Access Clarity 8.1 / 15

Operational Transparency 5.6 / 10

Contract Governance 1.6 / 9

Discoverability 5.6 / 8

Regulatory Posture 4.1 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 35/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

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 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 4 / 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 Insurance 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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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/first-street: 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 →

APIs 7

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

First Street Climate Risk API

The Climate Risk API provides physical climate risk data globally, delivering property-level insights into hazards including flood, wildfire, heat, wind, and air quality.

First Street Enterprise API

The Enterprise API offers aggregated climate risk views for portfolios, enabling enterprise users to assess risk across multiple properties and geographic regions.

First Street Raster Map API

The Raster Map API delivers visual raster layers of climate perils for mapping and visualization use cases.

First Street Enterprise API

The Enterprise API from First Street — 1 operation(s) for enterprise.

First Street Maps API

The Maps API from First Street — 1 operation(s) for maps.

First Street MCP Server

Hosted, remote Model Context Protocol server exposing the Climate Risk API to agents over Streamable HTTP. Ten tools with real JSON Schema inputs — property lookup by address, c...

First Street Graph QL API

The Graph QL API from First Street — 1 operation(s) for graph ql.

Scroll for all 7

Open Collections 5

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

First Street Enterprise API

OPEN COLLECTION

First Street Enterprise Graphql API

OPEN COLLECTION

First Street Enterprise Maps API

OPEN COLLECTION

First Street API

OPEN COLLECTION

MCP Servers 1

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

First Street MCP Server

First Street publishes a hosted, remote MCP server that exposes the Climate Risk API (property-level physical climate risk: flood, wildfire, wind, heat, cold, drought) to agents...

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

First Street Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

First Street Rate Limits

2 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

First Street Finops

FINOPS

Security Posture 4

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

First Street Authentication

apiKey/http · 2 schemes

SECURITY

First Street Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

First Street Vulnerability Disclosure

Hackerone · contact published

SECURITY

First Street Trust Center

SOC 2 Type II

SECURITY

Agentic Access 1

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

First Street Agentic Access

3 operations · 2 acting

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

Sandbox

Sandbox

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

MCPServer

AgentSkill

LLMsTxt

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

DataModel

Lifecycle

Conformance

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

ToolCrosswalk

Packages

SDKs

Access & Security 6

Authentication, authorization, and security posture

TrustCenter

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

Authentication

Compliance

Security

Operate 4

Status, limits, changes, and where to get help

StatusPage

ChangeLog

RateLimits

Support

Commercial 5

Pricing, plans, and the legal terms of use

Plans

FinOps

Pricing

TermsOfService

PrivacyPolicy

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: first-street
name: First Street
description: 'First Street is the physical climate risk data and analytics company behind the Risk Factor property reports,
  acquired by MSCI on 2026-08-03. It models flood, wildfire, wind, heat, cold, drought and air quality at property level anywhere
  on Earth using peer-reviewed, physics-based methods rather than historical claims data, and exposes that model through three
  APIs: a global Climate Risk GraphQL API, an Enterprise GraphQL API for portfolio-level exposure, scenario analysis and adaptation
  cost-benefit, and a Raster Map tile API for visualising perils on a map. It also runs a hosted MCP server so agents can
  query property climate risk directly. Access to every surface, and to individual fields within the GraphQL schemas, is granted
  by contract.'
type: Index
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: true
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - openapi
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: contract
  onboarding: sales-gate
  trial: false
  try_now: false
  public: false
  label: Contract-only · Sales-gated onboarding
  confidence: high
  source:
  - plans
  - authentication
  - docs
  generated: '2026-09-10'
  method: searched
  evidence: Corrected 2026-09-10. The previous value (freemium / self-serve / try_now) was derived from a 2026-05-04 scaffold
    that invented a Free tier First Street has never published. firststreet.org/pricing is a lead-capture form with no tiers
    or prices; the docs state "Access to these APIs differ by contractual agreement" and route every enquiry to an account
    executive or bd@firststreet.org; rate limits and field-level entitlements are both bound to the key at issuance. There
    is no self-serve path from signup to a callable key, and the Playground requires a key you already hold.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/first-street.png
access: 3rd-Party
created: '2025-03-01'
modified: '2026-09-10'
position: Consuming
tags:
- Climate
- Risk Management
- Environment
- Modeling
- Geospatial
- Insurance
- Real Estate
- Data
- GraphQL
- Mapping
tags_raw:
- Climate
- Risk
- Environment
- Modeling
- Geospatial
- Insurance
- Real Estate
- Data
- GraphQL
- Mapping
- Real-Estate
url: https://raw.githubusercontent.com/api-evangelist/first-street/refs/heads/main/apis.yml
specificationVersion: '0.23'
apis:
- aid: first-street:climate-risk
  name: First Street Climate Risk API
  tags:
  - Environment
  - Modeling
  - Risk Management
  - Climate
  - GraphQL
  tags_raw:
  - Environment
  - Modeling
  - Risk
  - Climate
  - GraphQL
  humanURL: https://docs.firststreet.org/api/climate-risk-api/getting-started
  baseURL: https://api.firststreet.org
  properties:
  - url: https://firststreet.org/
    type: Website
  - url: https://docs.firststreet.org/api/climate-risk-api/getting-started
    type: Documentation
  - url: graphql/first-street-climate-risk-api.graphql
    type: GraphQL
    name: First Street Climate Risk GraphQL SDL
  - url: https://docs.firststreet.org/api/climate-risk-api/getting-started/playground
    type: Playground
  description: The Climate Risk API provides physical climate risk data globally, delivering property-level insights into
    hazards including flood, wildfire, heat, wind, and air quality.
- aid: first-street:enterprise
  name: First Street Enterprise API
  tags:
  - Environment
  - Modeling
  - Risk Management
  - Climate
  - GraphQL
  tags_raw:
  - Environment
  - Modeling
  - Risk
  - Climate
  - GraphQL
  humanURL: https://docs.firststreet.org/api/enterprise-api/getting-started
  baseURL: https://api.firststreet.org
  properties:
  - url: https://firststreet.org/
    type: Website
  - url: https://docs.firststreet.org/api/enterprise-api/getting-started
    type: Documentation
  - url: graphql/first-street-enterprise-api.graphql
    type: GraphQL
    name: First Street Enterprise GraphQL SDL
  description: The Enterprise API offers aggregated climate risk views for portfolios, enabling enterprise users to assess
    risk across multiple properties and geographic regions.
- aid: first-street:raster-map
  name: First Street Raster Map API
  tags:
  - Environment
  - Modeling
  - Risk Management
  - Climate
  - Mapping
  tags_raw:
  - Environment
  - Modeling
  - Risk
  - Climate
  - Mapping
  humanURL: https://docs.firststreet.org/api/raster-map-api/getting-started
  baseURL: https://api.firststreet.org
  properties:
  - url: https://firststreet.org/
    type: Website
  - url: https://docs.firststreet.org/api/raster-map-api/getting-started
    type: Documentation
  description: The Raster Map API delivers visual raster layers of climate perils for mapping and visualization use cases.
- aid: first-street:first-street-enterprise-api
  name: First Street Enterprise API
  description: The Enterprise API from First Street — 1 operation(s) for enterprise.
  humanURL: https://docs.firststreet.org/api
  tags:
  - Enterprise
  baseURL: https://api.firststreet.org
  properties:
  - type: OpenAPI
    url: openapi/first-street-enterprise-api-openapi.yml
  - type: Overlay
    url: overlays/first-street-enterprise-api-overlay.yaml
  - type: GraphQL
    url: graphql/first-street-enterprise-api.graphql
- aid: first-street:first-street-maps-api
  name: First Street Maps API
  description: The Maps API from First Street — 1 operation(s) for maps.
  humanURL: https://docs.firststreet.org/api
  tags:
  - Maps
  baseURL: https://api.firststreet.org
  properties:
  - type: OpenAPI
    url: openapi/first-street-maps-api-openapi.yml
  - type: Overlay
    url: overlays/first-street-maps-api-overlay.yaml
- aid: first-street:mcp
  name: First Street MCP Server
  description: Hosted, remote Model Context Protocol server exposing the Climate Risk API to agents over Streamable HTTP.
    Ten tools with real JSON Schema inputs — property lookup by address, coordinate or Place ID, building discovery inside
    a polygon, adaptation cost-benefit, locality macroeconomics, metadata, and an arbitrary GraphQL escape hatch. Authenticated
    with the same API key as the rest of the surface; tools/list is answerable anonymously.
  humanURL: https://docs.firststreet.org/api/mcp/getting-started
  baseURL: https://mcp.firststreet.org/mcp
  tags:
  - MCP
  - Agents
  - Climate
  - Risk Management
  tags_raw:
  - MCP
  - Agents
  - Climate
  - Risk
  properties:
  - type: MCPServer
    url: mcp/first-street-mcp.yml
  - type: ToolCrosswalk
    url: mcp/first-street-tool-crosswalk.yml
  - type: Documentation
    url: https://docs.firststreet.org/api/mcp/getting-started
- aid: first-street:first-street-graph-ql-api
  name: First Street Graph QL API
  description: The Graph QL API from First Street — 1 operation(s) for graph ql.
  humanURL: https://docs.firststreet.org/api/climate-risk-api/getting-started
  baseURL: https://api.firststreet.org
  tags:
  - GraphQL
  tags_raw:
  - Graph QL
  properties:
  - type: OpenAPI
    url: openapi/first-street-graph-ql-api-openapi.yml
  - type: GraphQL
    url: graphql/first-street-climate-risk-api.graphql
common:
- type: Overlay
  url: overlays/first-street-graphql-api-overlay.yaml
- type: AgenticAccess
  url: agentic-access/first-street-agentic-access.yml
- type: TrustCenter
  url: security/first-street-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/first-street-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/first-street-domain-security.yml
- type: Authentication
  url: authentication/first-street-authentication.yml
- type: GitHubOrganization
  url: https://github.com/FirstStreet
- type: LinkedIn
  url: https://www.linkedin.com/company/first-street
- type: Website
  url: https://firststreet.org/
- type: Documentation
  url: https://docs.firststreet.org/api
- type: MCPServer
  url: mcp/first-street-mcp.yml
- type: ToolCrosswalk
  url: mcp/first-street-tool-crosswalk.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/first-street-llms.txt
- type: Packages
  url: packages/first-street-packages.yml
- type: SDKs
  url: packages/first-street-packages.yml
- type: Conventions
  url: conventions/first-street-conventions.yml
- type: ErrorCatalog
  url: errors/first-street-error-codes.yml
- type: DataModel
  url: data-model/first-street-data-model.yml
- type: Lifecycle
  url: lifecycle/first-street-lifecycle.yml
- type: StatusPage
  url: https://status.firststreet.org/
- type: ChangeLog
  url: changelog/first-street-changelog.yml
- type: Conformance
  url: conformance/first-street-conformance.yml
- type: Compliance
  url: https://security.firststreet.org/
- type: Security
  url: https://docs.firststreet.org/api/security
- type: Sandbox
  url: sandbox/first-street-sandbox.yml
- type: RateLimits
  url: rate-limits/first-street-rate-limits.yml
- type: Plans
  url: plans/first-street-plans-pricing.yml
- type: FinOps
  url: finops/first-street-finops.yml
- type: DeveloperPortal
  url: https://docs.firststreet.org/api
- type: APIReference
  url: https://docs.firststreet.org/api/available-api/graphql-apis
- type: GettingStarted
  url: https://docs.firststreet.org/api/climate-risk-api/getting-started
- type: Support
  url: mailto:api@firststreet.org
- type: Blog
  url: https://firststreet.org/insights
- type: Pricing
  url: https://firststreet.org/pricing
- type: Login
  url: https://firststreet.org/login
- type: TermsOfService
  url: https://www.msci.com/legal/terms-of-use
- type: PrivacyPolicy
  url: https://firststreet.org/privacy-policy
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-enrichment:
  date: '2026-09-10'
  status: enriched
  artifacts_added: 26
  pass: local-v3

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