Overflow

Overflow is a fintech giving platform for churches and nonprofits that lets organizations accept and reconcile donations across many asset types — card and ACH, Apple Pay and Google Pay, stock, cryptocurrency, RoundUps, and Donor Advised Funds (DAFs) — through a single unified platform. Overflow also offers Overflow Tap (NFC tap-to-give hardware) and Generosity University donor education. Its public Overflow Open API (v3) is a REST interface over contributions, donors, subscriptions (recurring gifts), payments, campaigns, deposits, refunds, chargebacks, locations, tap devices/events, and webhooks, authenticated with header API keys and used to sync giving data into CRMs and accounting/reconciliation workflows. Overflow is backed by Uncork Capital.

Overflow publishes 13 API contracts indexed on the APIs.io network, including Campaigns API, Chargebacks API, Contributions API, and 10 more. Tagged areas include Company, Fintech, Payments, Donations, and Fundraising.

The Overflow catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.

Overflow’s developer surface includes documentation, API reference, getting-started guide, authentication, engineering blog, signup flow, sandbox, and 22 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

54.8/100 strong ▬ flat Agent 34/100 agent ready Front door AI 3/6 light saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

1 published contract 3 Agent Skills

Company Fintech Payments Donations Fundraising Non-Profit Giving Recurring Payments Webhook Cryptocurrency

What this lets a business do 2

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Developer Platform & API Ecosystem Management

BC-4270

Webhooks

GET /api/v3/webhooks GET /api/v3/webhooks/{webhookId} GET /api/v3/webhooks/{webhookId}/event-logs

Customer Relationship Management

BC-420

Donors

POST /api/v3/donors

Kin Score

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

Composite quality — 54.8/100 · strong

Contract Quality 11.3 / 19

Developer Ergonomics 9.2 / 15

Access Clarity 11.1 / 15

Operational Transparency 2.6 / 10

Contract Governance 1.6 / 9

Discoverability 5.5 / 8

Regulatory Posture 3.3 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 34/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 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 Payments 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/.

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

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
Protected Resource Metadata +5 pts — a served /.well-known/oauth-protected-resource carrying `resource` (documented), and naming its authorization_servers (verified)

4 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 60.5 — up to +9.9 composite points
Contract Governance scores 18.2 — up to +9.8 composite points
Operational Transparency scores 26.3 — up to +9.6 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/overflow/apis.yml: open an issue on github.com/api-evangelist/overflow 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Nonprofit and Fundraising	long-tail	2.5 (thin)	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

APIs 13

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

Overflow Campaigns API

The Campaigns API from Overflow — 2 operation(s) for campaigns.

Overflow Chargebacks API

The Chargebacks API from Overflow — 2 operation(s) for chargebacks.

Overflow Contributions API

The Contributions API from Overflow — 3 operation(s) for contributions.

Overflow Deposits API

The Deposits API from Overflow — 3 operation(s) for deposits.

Overflow Donors API

The Donors API from Overflow — 2 operation(s) for donors.

Overflow Locations API

The Locations API from Overflow — 2 operation(s) for locations.

Overflow Payment Methods API

The Payment Methods API from Overflow — 1 operation(s) for payment methods.

Overflow Payments API

The Payments API from Overflow — 1 operation(s) for payments.

Overflow Refunds API

The Refunds API from Overflow — 2 operation(s) for refunds.

Overflow Status API

The Status API from Overflow — 1 operation(s) for status.

Overflow Subscriptions API

The Subscriptions API from Overflow — 3 operation(s) for subscriptions.

Overflow Tap API

The Tap API from Overflow — 7 operation(s) for tap.

Overflow Webhooks API

The Webhooks API from Overflow — 3 operation(s) for webhooks.

Scroll for all 13

Open Collections 13

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

Overflow Open Campaigns API

OPEN COLLECTION

Overflow Open Campaigns Chargebacks API

OPEN COLLECTION

Overflow Open Campaigns Contributions API

OPEN COLLECTION

Overflow Open Campaigns Deposits API

OPEN COLLECTION

Overflow Open Campaigns Donors API

OPEN COLLECTION

Overflow Open Campaigns Locations API

OPEN COLLECTION

Overflow Open Campaigns Payment Methods API

OPEN COLLECTION

Overflow Open Campaigns Payments API

OPEN COLLECTION

Overflow Open Campaigns Refunds API

OPEN COLLECTION

Overflow Open Campaigns Status API

OPEN COLLECTION

Overflow Open Campaigns Subscriptions API

OPEN COLLECTION

Overflow Open Campaigns Tap API

OPEN COLLECTION

Overflow Open Campaigns Webhooks API

OPEN COLLECTION

Scroll for all 13

Agent Skills 3

Packaged agent skills for driving this provider's APIs from an AI assistant.

Reconcile Overflow deposits

AGENT SKILL

Record a donation with Overflow

AGENT SKILL

Set up a recurring gift with Overflow

AGENT SKILL

Overflow API pricing

Prices published by Overflow, read 2026-10-28 from www.overflow.co/pricing.

Plan	Price
Foundation	$50/ month Includes: Card, ACH, Apple Pay, Google Pay, text and guest giving; Stock, Crypto, DAF; RoundUps; CRM integrati
Growth	Starting at $1,000/ year Includes: Everything in Foundation, plus dedicated onboarding specialist, account manager, priority support, t
Enterprise	Custom Includes: Everything in Growth, plus implementation engineer, strategic account manager, premier support; Stoc

Plan details, limits and sources →

Billed by: organization · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

Overflow Plans Pricing

3 plans

PLANS

Overflow Price Estimates

0 plans

PLANS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Overflow

SLA

FinOps 1

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

Overflow Finops

FINOPS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Overflow Webhooks

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Overflow API Rules

60 rules · 52 errors 6 warnings 2 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Overflow Openapi Overlay

2 actions · update · overflow-openapi-original.json

DERIVED

Security Posture 2

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

Overflow Authentication

apiKey · 2 schemes

SECURITY

Overflow Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Overflow Agentic Access

38 operations · 8 acting · 8 human-in-the-loop

38 operations · 8 acting

AGENTIC

Resources

Get Started 5

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Login

Sandbox

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

X-MCPServerCandidate

X-MCPServerCandidate

AgenticAccess

AgenticAccess

AgentSkill

AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Webhooks

Conformance

ErrorCatalog

Lifecycle

Conventions

DataModel

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

RateLimits

RateLimits

StatusPage

StatusPage

Commercial 3

Pricing, plans, and the legal terms of use

Plans

Plans

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Overlay

Overlay

Source (apis.yml)

aid: overflow
name: Overflow
description: Overflow is a fintech giving platform for churches and nonprofits that lets organizations accept and reconcile
  donations across many asset types — card and ACH, Apple Pay and Google Pay, stock, cryptocurrency, RoundUps, and Donor Advised
  Funds (DAFs) — through a single unified platform. Overflow also offers Overflow Tap (NFC tap-to-give hardware) and Generosity
  University donor education. Its public Overflow Open API (v3) is a REST interface over contributions, donors, subscriptions
  (recurring gifts), payments, campaigns, deposits, refunds, chargebacks, locations, tap devices/events, and webhooks, authenticated
  with header API keys and used to sync giving data into CRMs and accounting/reconciliation workflows. Overflow is backed
  by Uncork Capital.
url: https://raw.githubusercontent.com/api-evangelist/overflow/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: high
  source:
  - plans
  - authentication
  - security
  - sandbox
  generated: '2026-11-06'
  method: derived
image: https://cdn.prod.website-files.com/661982b7ce6b433411c6e0c8/661986ff805671631abc51f8_Open%20Graph%20Image.webp
x-type: company
x-source: vc-portfolio
x-backed-by:
- uncork-capital
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
x-docs-platform: mintlify
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-04
tags:
- Company
- Fintech
- Payments
- Donations
- Fundraising
- Non-Profit
- Giving
- Recurring Payments
- Webhook
- Cryptocurrency
tags_raw:
- Company
- Fintech
- Payments
- Donations
- Fundraising
- Nonprofit
- Giving
- Recurring Payments
- Webhooks
- Cryptocurrency
apis:
- aid: overflow:overflow-campaigns-api
  name: Overflow Campaigns API
  description: The Campaigns API from Overflow — 2 operation(s) for campaigns.
  humanURL: https://docs.overflow.co/api-reference/welcome
  baseURL: https://server.overflow.co
  tags:
  - Campaigns
  properties:
  - type: OpenAPI
    url: openapi/overflow-campaigns-api-openapi.yml
  - type: Documentation
    url: https://docs.overflow.co/api-reference/welcome
  - type: APIReference
    url: https://docs.overflow.co/api-reference/welcome
  - type: Authentication
    url: authentication/overflow-authentication.yml
  - type: Webhooks
    url: asyncapi/overflow-webhooks.yml
- aid: overflow:overflow-chargebacks-api
  name: Overflow Chargebacks API
  description: The Chargebacks API from Overflow — 2 operation(s) for chargebacks.
  humanURL: https://docs.overflow.co/api-reference/welcome
  baseURL: https://server.overflow.co
  tags:
  - Chargebacks
  properties:
  - type: OpenAPI
    url: openapi/overflow-chargebacks-api-openapi.yml
  - type: Documentation
    url: https://docs.overflow.co/api-reference/welcome
  - type: APIReference
    url: https://docs.overflow.co/api-reference/welcome
  - type: Authentication
    url: authentication/overflow-authentication.yml
  - type: Webhooks
    url: asyncapi/overflow-webhooks.yml
- aid: overflow:overflow-contributions-api
  name: Overflow Contributions API
  description: The Contributions API from Overflow — 3 operation(s) for contributions.
  humanURL: https://docs.overflow.co/api-reference/welcome
  baseURL: https://server.overflow.co
  tags:
  - Contributions
  properties:
  - type: OpenAPI
    url: openapi/overflow-contributions-api-openapi.yml
  - type: Documentation
    url: https://docs.overflow.co/api-reference/welcome
  - type: APIReference
    url: https://docs.overflow.co/api-reference/welcome
  - type: Authentication
    url: authentication/overflow-authentication.yml
  - type: Webhooks
    url: asyncapi/overflow-webhooks.yml
- aid: overflow:overflow-deposits-api
  name: Overflow Deposits API
  description: The Deposits API from Overflow — 3 operation(s) for deposits.
  humanURL: https://docs.overflow.co/api-reference/welcome
  baseURL: https://server.overflow.co
  tags:
  - Deposits
  properties:
  - type: OpenAPI
    url: openapi/overflow-deposits-api-openapi.yml
  - type: Documentation
    url: https://docs.overflow.co/api-reference/welcome
  - type: APIReference
    url: https://docs.overflow.co/api-reference/welcome
  - type: Authentication
    url: authentication/overflow-authentication.yml
  - type: Webhooks
    url: asyncapi/overflow-webhooks.yml
- aid: overflow:overflow-donors-api
  name: Overflow Donors API
  description: The Donors API from Overflow — 2 operation(s) for donors.
  humanURL: https://docs.overflow.co/api-reference/welcome
  baseURL: https://server.overflow.co
  tags:
  - Donors
  properties:
  - type: OpenAPI
    url: openapi/overflow-donors-api-openapi.yml
  - type: Documentation
    url: https://docs.overflow.co/api-reference/welcome
  - type: APIReference
    url: https://docs.overflow.co/api-reference/welcome
  - type: Authentication
    url: authentication/overflow-authentication.yml
  - type: Webhooks
    url: asyncapi/overflow-webhooks.yml
- aid: overflow:overflow-locations-api
  name: Overflow Locations API
  description: The Locations API from Overflow — 2 operation(s) for locations.
  humanURL: https://docs.overflow.co/api-reference/welcome
  baseURL: https://server.overflow.co
  tags:
  - Location
  tags_raw:
  - Locations
  properties:
  - type: OpenAPI
    url: openapi/overflow-locations-api-openapi.yml
  - type: Documentation
    url: https://docs.overflow.co/api-reference/welcome
  - type: APIReference
    url: https://docs.overflow.co/api-reference/welcome
  - type: Authentication
    url: authentication/overflow-authentication.yml
  - type: Webhooks
    url: asyncapi/overflow-webhooks.yml
- aid: overflow:overflow-payment-methods-api
  name: Overflow Payment Methods API
  description: The Payment Methods API from Overflow — 1 operation(s) for payment methods.
  humanURL: https://docs.overflow.co/api-reference/welcome
  baseURL: https://server.overflow.co
  tags:
  - Payment Methods
  properties:
  - type: OpenAPI
    url: openapi/overflow-payment-methods-api-openapi.yml
  - type: Documentation
    url: https://docs.overflow.co/api-reference/welcome
  - type: APIReference
    url: https://docs.overflow.co/api-reference/welcome
  - type: Authentication
    url: authentication/overflow-authentication.yml
  - type: Webhooks
    url: asyncapi/overflow-webhooks.yml
- aid: overflow:overflow-payments-api
  name: Overflow Payments API
  description: The Payments API from Overflow — 1 operation(s) for payments.
  humanURL: https://docs.overflow.co/api-reference/welcome
  baseURL: https://server.overflow.co
  tags:
  - Payments
  properties:
  - type: OpenAPI
    url: openapi/overflow-payments-api-openapi.yml
  - type: Documentation
    url: https://docs.overflow.co/api-reference/welcome
  - type: APIReference
    url: https://docs.overflow.co/api-reference/welcome
  - type: Authentication
    url: authentication/overflow-authentication.yml
  - type: Webhooks
    url: asyncapi/overflow-webhooks.yml
- aid: overflow:overflow-refunds-api
  name: Overflow Refunds API
  description: The Refunds API from Overflow — 2 operation(s) for refunds.
  humanURL: https://docs.overflow.co/api-reference/welcome
  baseURL: https://server.overflow.co
  tags:
  - Refunds
  properties:
  - type: OpenAPI
    url: openapi/overflow-refunds-api-openapi.yml
  - type: Documentation
    url: https://docs.overflow.co/api-reference/welcome
  - type: APIReference
    url: https://docs.overflow.co/api-reference/welcome
  - type: Authentication
    url: authentication/overflow-authentication.yml
  - type: Webhooks
    url: asyncapi/overflow-webhooks.yml
- aid: overflow:overflow-status-api
  name: Overflow Status API
  description: The Status API from Overflow — 1 operation(s) for status.
  humanURL: https://docs.overflow.co/api-reference/welcome
  baseURL: https://server.overflow.co
  tags:
  - Status
  properties:
  - type: OpenAPI
    url: openapi/overflow-status-api-openapi.yml
  - type: Documentation
    url: https://docs.overflow.co/api-reference/welcome
  - type: APIReference
    url: https://docs.overflow.co/api-reference/welcome
  - type: Authentication
    url: authentication/overflow-authentication.yml
  - type: Webhooks
    url: asyncapi/overflow-webhooks.yml
- aid: overflow:overflow-subscriptions-api
  name: Overflow Subscriptions API
  description: The Subscriptions API from Overflow — 3 operation(s) for subscriptions.
  humanURL: https://docs.overflow.co/api-reference/welcome
  baseURL: https://server.overflow.co
  tags:
  - Subscription
  tags_raw:
  - Subscriptions
  properties:
  - type: OpenAPI
    url: openapi/overflow-subscriptions-api-openapi.yml
  - type: Documentation
    url: https://docs.overflow.co/api-reference/welcome
  - type: APIReference
    url: https://docs.overflow.co/api-reference/welcome
  - type: Authentication
    url: authentication/overflow-authentication.yml
  - type: Webhooks
    url: asyncapi/overflow-webhooks.yml
- aid: overflow:overflow-tap-api
  name: Overflow Tap API
  description: The Tap API from Overflow — 7 operation(s) for tap.
  humanURL: https://docs.overflow.co/api-reference/welcome
  baseURL: https://server.overflow.co
  tags:
  - TAP
  tags_raw:
  - Tap
  properties:
  - type: OpenAPI
    url: openapi/overflow-tap-api-openapi.yml
  - type: Documentation
    url: https://docs.overflow.co/api-reference/welcome
  - type: APIReference
    url: https://docs.overflow.co/api-reference/welcome
  - type: Authentication
    url: authentication/overflow-authentication.yml
  - type: Webhooks
    url: asyncapi/overflow-webhooks.yml
- aid: overflow:overflow-webhooks-api
  name: Overflow Webhooks API
  description: The Webhooks API from Overflow — 3 operation(s) for webhooks.
  humanURL: https://docs.overflow.co/api-reference/welcome
  baseURL: https://server.overflow.co
  tags:
  - Webhook
  tags_raw:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/overflow-webhooks-api-openapi.yml
  - type: Documentation
    url: https://docs.overflow.co/api-reference/welcome
  - type: APIReference
    url: https://docs.overflow.co/api-reference/welcome
  - type: Authentication
    url: authentication/overflow-authentication.yml
  - type: Webhooks
    url: asyncapi/overflow-webhooks.yml
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 16
  pass: local-v1
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/overflow-plans-pricing.yml
- type: CapabilityMap
  url: capabilities/overflow-capability-edges.yml
  name: Overflow Business Capability Map
- type: Website
  url: https://www.overflow.co/
- type: DeveloperPortal
  url: https://docs.overflow.co
- type: Documentation
  url: https://docs.overflow.co
- type: APIReference
  url: https://docs.overflow.co/api-reference/welcome
- type: GettingStarted
  url: https://docs.overflow.co/api-reference/quickstart
- type: Authentication
  url: authentication/overflow-authentication.yml
- type: RateLimits
  url: https://docs.overflow.co/api-reference/rate-limiting
- type: Webhooks
  url: asyncapi/overflow-webhooks.yml
- type: StatusPage
  url: https://status.overflow.co
- type: Blog
  url: https://www.overflow.co/learn
- type: GitHubOrganization
  url: https://github.com/overflow-co
- type: SignUp
  url: https://dashboard.overflow.co/login
- type: Login
  url: https://dashboard.overflow.co/login
- type: TermsOfService
  url: https://www.overflow.co/terms
- type: PrivacyPolicy
  url: https://www.overflow.co/privacy
- type: LLMsTxt
  url: llms/overflow-llms.txt
- type: X-MCPServerCandidate
  url: mcp/overflow-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: Overlay
  url: overlays/overflow-openapi-overlay.yaml
- type: Conformance
  url: conformance/overflow-conformance.yml
- type: ErrorCatalog
  url: errors/overflow-problem-types.yml
- type: Lifecycle
  url: lifecycle/overflow-lifecycle.yml
- type: DomainSecurity
  url: security/overflow-domain-security.yml
- type: Conventions
  url: conventions/overflow-conventions.yml
- type: Sandbox
  url: sandbox/overflow-sandbox.yml
- type: DataModel
  url: data-model/overflow-data-model.yml
- type: AgenticAccess
  url: agentic-access/overflow-agentic-access.yml
- type: AgentSkill
  url: skills/_index.yml

Overflow API — frequently asked questions

Does Overflow have an API?

Yes. APIs.io lists 13 APIs from Overflow, including Overflow Campaigns API, Overflow Chargebacks API and Overflow Contributions API, and 10 more.

Is there an OpenAPI specification for the Overflow API?

Yes. APIs.io indexes 13 OpenAPI specifications for Overflow, each linked for download from this page.

How do I authenticate with the Overflow API?

Overflow uses bearer-token authentication (apiKey · 2 schemes). The details are profiled on APIs.io as Overflow Authentication.

How much does the Overflow API cost?

Overflow publishes its prices; its Foundation plan is $50/ month as of 2026-10-28. APIs.io lists 3 pricing plans for Overflow, with each plan's price, limits and inclusions under Pricing on this page.

Is the Overflow API ready for AI agents?

Overflow has a Kin Score of 54.8 out of 100 (strong) and an Agent Readiness score of 33.8 (agent-ready), scored by API Evangelist on 2026-11-06.

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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.

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How their score was established

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