Wren

Wren is a company surfaced as a portfolio company of union-square-ventures and added to the API Evangelist network as a stub for enrichment. This profile is a lead awaiting the enrichment pipeline.

Wren publishes 7 APIs on the APIs.io network, including Credits API, Offset Orders API, Portfolios API, and 4 more. Tagged areas include Company.

🌐 Visit website 📡 Source on GitHub

6.0/100 minimal ▬ flat Agent 18/100 agent aware Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

1 APIs

Company

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 6.0/100 · minimal

Contract Quality 3.2 / 23

Developer Ergonomics 0.0 / 18

Access Clarity 0.0 / 18

Operational Transparency 0.0 / 12

Contract Governance 0.0 / 11

Discoverability 2.8 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 18/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 7 / 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

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.

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/wren: 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.

Wren Credits API

Manage the prepaid credit balance

Wren Offset Orders API

Create and list carbon offset orders by tonnage

Wren Portfolios API

List available portfolios and their projects

Wren Project Donations API

List non-offsettable project funding

Wren Project Orders API

Fund a specific project by dollar amount

Wren Purchases API

List purchase summaries with certificate URLs

Wren Tree Orders API

Create and list tree-planting orders

Scroll for all 7

Postman Collections 1

Ready-to-run Postman collections for exercising this provider's APIs.

Wren API

POSTMAN

Open Collections 8

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

API Collection

OPEN COLLECTION

Wren Credits API

OPEN COLLECTION

Wren Credits Offset Orders API

OPEN COLLECTION

Wren Credits Portfolios API

OPEN COLLECTION

Wren Credits Project Donations API

OPEN COLLECTION

Wren Credits Project Orders API

OPEN COLLECTION

Wren Credits Purchases API

OPEN COLLECTION

Wren Credits Tree Orders API

OPEN COLLECTION

Scroll for all 8

Resources

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: wren
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: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - url: https://projectwren.com
    status: 301
    note: declared website redirects to https://www.wren.co/ — a different registrable domain (projectwren.com -> wren.co),
      possible rename or acquisition (probed 2026-09-03, roadmap#169)
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/wren.png
name: Wren
description: Wren is a company surfaced as a portfolio company of union-square-ventures and added to the API Evangelist network
  as a stub for enrichment. This profile is a lead awaiting the enrichment pipeline.
url: https://raw.githubusercontent.com/api-evangelist/wren/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- union-square-ventures
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-17'
tags:
- Company
apis:
- aid: wren:wren-credits-api
  name: Wren Credits API
  description: Manage the prepaid credit balance
  tags:
  - Credits
  properties:
  - type: OpenAPI
    url: openapi/wren-credits-api-openapi.yml
- aid: wren:wren-offset-orders-api
  name: Wren Offset Orders API
  description: Create and list carbon offset orders by tonnage
  tags:
  - Offset Orders
  properties:
  - type: OpenAPI
    url: openapi/wren-offset-orders-api-openapi.yml
- aid: wren:wren-portfolios-api
  name: Wren Portfolios API
  description: List available portfolios and their projects
  tags:
  - Portfolio
  tags_raw:
  - Portfolios
  properties:
  - type: OpenAPI
    url: openapi/wren-portfolios-api-openapi.yml
- aid: wren:wren-project-donations-api
  name: Wren Project Donations API
  description: List non-offsettable project funding
  tags:
  - Project Donations
  properties:
  - type: OpenAPI
    url: openapi/wren-project-donations-api-openapi.yml
- aid: wren:wren-project-orders-api
  name: Wren Project Orders API
  description: Fund a specific project by dollar amount
  tags:
  - Project Orders
  properties:
  - type: OpenAPI
    url: openapi/wren-project-orders-api-openapi.yml
- aid: wren:wren-purchases-api
  name: Wren Purchases API
  description: List purchase summaries with certificate URLs
  tags:
  - Purchases
  properties:
  - type: OpenAPI
    url: openapi/wren-purchases-api-openapi.yml
- aid: wren:wren-tree-orders-api
  name: Wren Tree Orders API
  description: Create and list tree-planting orders
  tags:
  - Tree Orders
  properties:
  - type: OpenAPI
    url: openapi/wren-tree-orders-api-openapi.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://projectwren.com

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/wren"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/wren/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/wren/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.