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 publishes 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 documentation, API reference, quickstart, signup flow, support, CLI, authentication, and 14 more developer resources.

🌐 Visit website 📡 Source on GitHub

22.6/100 emerging ▬ flat Agent 12/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

1 APIs 1 MCP Servers

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

Kin Score

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

Composite quality — 22.6/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 12.9 / 20

Access Clarity 1.3 / 20

Operational Transparency 0.3 / 13

Contract Governance 0.5 / 12

Discoverability 7.6 / 10

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

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.

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/ascendio: 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 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

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 1

The organization behind the API

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: '2026-09-03'
  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: '2026-07-18'
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:
- 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

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