aid: ascendio
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  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: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- 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