Ascend.io

Ascend.io is a data engineering platform for building declarative, DataAware data pipelines that unify ingestion, transformation, and orchestration across warehouses like BigQuery, Snowflake, Databricks, and MotherDuck. Pipelines are authored in SQL, Python, and YAML and operated through Otto, Ascend's agentic AI assistant. Its developer surface is the Ascend Instance web API (/api/v1, service-account Bearer auth) exposed through the ascend-tools CLI, first-party Python/JavaScript/Rust SDKs, and an official 25-tool MCP server. Ascend announced in 2026 that it is winding down operations; the open-source tooling and documentation remain published at capture time. Added to the API Evangelist network as an Accel portfolio company.

Ascend.io is listed with 1 API on the APIs.io network. Tagged areas include Company, Big Data, Data Engineering, Data Pipeline, and ETL.

Ascend.io’s developer surface includes engineering blog, documentation, API reference, quickstart, signup flow, support, CLI, and 15 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

22.9/100 emerging ▬ flat Agent 12/100 agent aware Front door AI 2/6 trace Heartbeat 24/100 dormant saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 API 1 MCP Servers 5 Agent Skills

Company Big Data Data Engineering Data Pipeline ETL Orchestration Data Automation MCP Developer Tools

Kin Score

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

Composite quality — 22.9/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 11.3 / 17

Access Clarity 1.1 / 17

Operational Transparency 0.3 / 11

Contract Governance 0.5 / 10

Discoverability 6.1 / 9

Regulatory Posture 2.5 / 15

Agent readiness — 12/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 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 0 / 7

Typed Event Surface 0 / 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 Horizontal (data, software, accessibility, platform) 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/.

Show this score on your site.

It updates itself when the score changes. Paste this where you link to your API docs:

<a href="https://apis.io/providers/ascendio/"><img src="https://apis.io/badge/ascendio/card.svg" alt="Ascend.io on APIs.io — Kin Score by API Evangelist"></a>

Other styles, a README pill and a shields.io endpoint are on the badge page.

Raise your score.

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

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
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
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link

9 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
Access Clarity scores 6.6 — up to +18.7 composite points
Operational Transparency scores 2.6 — up to +12.7 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/ascendio/apis.yml: open an issue on github.com/api-evangelist/ascendio 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 →

Standards implemented 2

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.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

Agent Skills

measured — observed by APIs.io (published)

APIs 1

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

Ascend Instance API

REST API (/api/v1) for managing Ascend workspaces, deployments, environments, projects, profiles, flows, flow runs, and Otto. Service-account Bearer authentication.

MCP Servers 1

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

Ascend.io MCP Server

Official MCP server for the Ascend Instance web API. Exposes 25 tools for managing workspaces, deployments, environments, projects, profiles, flows, flow runs, and Otto (Ascend'...

MCP SERVER

Agent Skills 5

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

ascend-tools-cli

AGENT SKILL

ascend-tools-javascript

AGENT SKILL

ascend-tools-mcp

AGENT SKILL

ascend-tools-python

AGENT SKILL

ascend-tools-rust

AGENT SKILL

Security Posture 2

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

Ascendio Authentication

http-bearer/service-account · 1 scheme

SECURITY

Ascendio Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

Quickstart

Quickstart

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

MCPServer

MCPServer

AgentSkill

AgentSkill

LLMsTxt

LLMsTxt

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

DataModel

Conformance

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

Packages

SDKs

CLI

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Company 2

The organization behind the API

Blog

Blog

Website

Website

Source (apis.yml)

aid: ascendio
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/ascendio.png
name: Ascend.io
description: Ascend.io is a data engineering platform for building declarative, DataAware data pipelines that unify ingestion,
  transformation, and orchestration across warehouses like BigQuery, Snowflake, Databricks, and MotherDuck. Pipelines are
  authored in SQL, Python, and YAML and operated through Otto, Ascend's agentic AI assistant. Its developer surface is the
  Ascend Instance web API (/api/v1, service-account Bearer auth) exposed through the ascend-tools CLI, first-party Python/JavaScript/Rust
  SDKs, and an official 25-tool MCP server. Ascend announced in 2026 that it is winding down operations; the open-source tooling
  and documentation remain published at capture time. Added to the API Evangelist network as an Accel portfolio company.
url: https://raw.githubusercontent.com/api-evangelist/ascendio/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- accel
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
tags:
- Company
- Big Data
- Data Engineering
- Data Pipeline
- ETL
- Orchestration
- Data Automation
- MCP
- Developer Tools
tags_raw:
- Company
- Big Data
- Data Engineering
- Data Pipelines
- ETL
- Orchestration
- Data Automation
- MCP
- Developer Tools
apis:
- name: Ascend Instance API
  description: REST API (/api/v1) for managing Ascend workspaces, deployments, environments, projects, profiles, flows, flow
    runs, and Otto. Service-account Bearer authentication.
  humanURL: https://docs.ascend.io/reference/api/ascend-api
  baseURL: https://api.instance.ascend.io/api/v1
  properties:
  - type: Authentication
    url: authentication/ascendio-authentication.yml
  - type: Conventions
    url: conventions/ascendio-conventions.yml
  - type: ErrorCatalog
    url: errors/ascendio-error-codes.yml
  - type: DataModel
    url: data-model/ascendio-data-model.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- url: https://www.ascend.io/blog/
  type: Blog
- type: Website
  url: https://www.ascend.io
- type: DeveloperPortal
  url: https://developer.ascend.io
- type: Documentation
  url: https://docs.ascend.io
- type: APIReference
  url: https://docs.ascend.io/reference/api/ascend-api
- type: Quickstart
  url: https://docs.ascend.io/getting-started/quickstart
- type: GitHubOrganization
  url: https://github.com/ascend-io
- type: SignUp
  url: https://app.ascend.io/signup
- type: Support
  url: https://docs.ascend.io/support
- type: Packages
  url: packages/ascendio-packages.yml
- type: SDKs
  url: packages/ascendio-packages.yml
- type: CLI
  url: cli/ascendio-cli.yml
- type: MCPServer
  url: mcp/ascendio-mcp.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Authentication
  url: authentication/ascendio-authentication.yml
- type: Conventions
  url: conventions/ascendio-conventions.yml
- type: ErrorCatalog
  url: errors/ascendio-error-codes.yml
- type: Lifecycle
  url: lifecycle/ascendio-lifecycle.yml
- type: DataModel
  url: data-model/ascendio-data-model.yml
- type: Conformance
  url: conformance/ascendio-conformance.yml
- type: DomainSecurity
  url: security/ascendio-domain-security.yml
- type: LLMsTxt
  url: llms/ascendio-llms.txt
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

Ascend.io API — frequently asked questions

Does Ascend.io have an API?

Yes. APIs.io lists 1 API from Ascend.io, including Ascend Instance API.

How do I authenticate with the Ascend.io API?

Ascend.io uses bearer-token authentication (http-bearer/service-account · 1 scheme). The details are profiled on APIs.io as Ascendio Authentication.

Does Ascend.io have an MCP server?

Yes. APIs.io lists 1 MCP server for Ascend.io: Official MCP server for the Ascend Instance web API. Exposes 25 tools for managing workspaces, deployments, environments, projects, profiles, flows, flow runs, and Otto (Ascend's agentic AI assistant)

Is the Ascend.io API ready for AI agents?

Ascend.io has a Kin Score of 22.9 out of 100 (emerging) and an Agent Readiness score of 12.4 (agent-aware), scored by API Evangelist on 2026-11-06.

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/ascendio"

All providers

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

Every operation they expose

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

How their score was established

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

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

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.