| Endpoint essentials | |
|---|---|
| API key access | api/v1/organizations/bulk_enrich or Master API key |
| OAuth scopes | organizations_bulk_enrich |
| Account access | Requires an Apollo account registered with a work email address. Additional account eligibility requirements may apply. Paid accounts aren't affected. |
| Credit usage | 1 credit per organizationLearn more about API pricing and credits. |
domains\[] query parameter, or by providing a details array in the request body where each company can be matched by any combination of domain, LinkedIn URL, name, and website.owned\_by\_organization field identifies the immediate parent, owned\_by\_chain lists parent organization IDs from the immediate parent to the ultimate parent, and ultimate\_parent\_organization identifies the topmost parent. Each result also includes num\_suborganizations and subsidiary\_rollups with the total estimated subsidiary employee count and distinct subsidiary countries and industries.
# OpenAPI definition
```json
{
"openapi": "3.1.0",
"info": {
"title": "apollo-rest-api",
"summary": "Programmatic access to Apollo's sales intelligence and engagement platform — data enrichment, prospect and company search, and go-to-market workflow management.",
"description": "The Apollo API provides programmatic access to [Apollo](https://www.apollo.io/), the all-in-one sales intelligence and engagement platform. Use it to enrich people and company data (individually or in bulk), search Apollo's database of over 240 million contacts and 30 million companies, and manage accounts, contacts, deals, sequences, tasks, calls, and conversations in your go-to-market workflows.\n\n## Base URL\n\nAll API requests are made to `https://api.apollo.io/api/v1`.\n\n## Authentication\n\n- **Apollo users** authenticate with an API key passed in the `x-api-key` request header. See [Create API Keys](https://docs.apollo.io/docs/create-api-key).\n- **Apollo partners** building integrations on behalf of mutual users authenticate with the [OAuth 2.0 authorization flow](https://docs.apollo.io/docs/use-oauth-20-authorization-flow-to-access-apollo-user-information-partners).\n\n## Rate limits & credits\n\nRate limits and credit consumption depend on your [Apollo pricing plan](https://docs.apollo.io/docs/api-pricing). Check your current limits and usage with the [view API usage stats and rate limits](https://docs.apollo.io/reference/view-api-usage-stats) endpoint. For more details, see [Rate Limits](https://docs.apollo.io/reference/rate-limits) and the [API FAQs](https://docs.apollo.io/docs/apollo-api-faqs).\n\nNew to the API? Start with the [Apollo API overview](https://docs.apollo.io/reference/apollo-api).",
"termsOfService": "https://www.apollo.io/terms/api",
"contact": {
"name": "Apollo API Support",
"url": "https://docs.apollo.io/"
},
"version": "1.0"
},
"servers": [
{
"url": "https://api.apollo.io/api/v1"
}
],
"tags": [
{
"name": "Enrichment",
"description": "Enrich people and company records, individually or in bulk."
}
],
"components": {
"securitySchemes": {
"apiKey": {
"type": "apiKey",
"in": "header",
"name": "x-api-key",
"description": "[Recommended] API key, passed in the `x-api-key` request header.\nSee [Create API Keys](https://docs.apollo.io/docs/create-api-key)."
},
"bearerAuth": {
"type": "http",
"scheme": "bearer",
"bearerFormat": "JWT",
"description": "OAuth 2.0 access token, used by Apollo partners building integrations.\nSee the [OAuth 2.0 authorization flow](https://docs.apollo.io/docs/use-oauth-20-authorization-flow-to-access-apollo-user-information-partners)."
}
},
"schemas": {
"ErrorDetails": {
"type": "object",
"description": "Machine-readable detail for an error that uses the new format, returned alongside the endpoint's existing error fields. The legacy error fields at the root level (`error`, `error_code`, `message`, etc) are removed on 2027-02-16, after which `error_details` is the only error payload. Some errors already return `error_details` on its own.",
"properties": {
"code": {
"type": "string",
"description": "Stable identifier in the form `DOMAIN.CATEGORY.REASON`. Branch on this value; the human-readable `message` can change.",
"example": "AUTH.AUTHENTICATION.CREDENTIALS_MISSING"
},
"message": {
"type": "string",
"description": "Human-readable explanation of what went wrong.",
"example": "This request carried no credential Apollo could authenticate."
},
"suggestions": {
"type": "array",
"description": "Ordered, actionable next steps. Each entry carries a `label`, and where relevant the `parameter`, `header`, or `url` it refers to.",
"items": {
"type": "object",
"properties": {
"label": {
"type": "string",
"example": "Send your API key in the X-Api-Key header"
},
"url": {
"type": "string",
"example": "https://docs.apollo.io/reference/authentication"
},
"parameter": {
"type": "string",
"example": "webhook_url"
},
"parameters": {
"type": "array",
"description": "Several parameters, any one of which satisfies the requirement.",
"items": {
"type": "string"
},
"example": [
"name",
"domain",
"website_url",
"linkedin_url"
]
},
"header": {
"type": "string",
"example": "X-Api-Key"
},
"example": {
"type": "string",
"description": "A valid sample value for the parameter named above."
},
"retry_after_seconds": {
"type": "integer",
"description": "On a rate-limit refusal, how long to wait before retrying.",
"example": 60
}
}
}
},
"context": {
"type": "object",
"description": "Values from your request that explain the refusal. Each entry is an object rather than a bare value, so read `context.domains[] query parameter, or by providing a details array in the request body where each company can be matched by any combination of domain, LinkedIn URL, name, and website.owned_by_organization field identifies the immediate parent, owned_by_chain lists parent organization IDs from the immediate parent to the ultimate parent, and ultimate_parent_organization identifies the topmost parent. Each result also includes num_suborganizations and subsidiary_rollups with the total estimated subsidiary employee count and distinct subsidiary countries and industries.",
"tags": [
"Enrichment"
],
"operationId": "bulk-organization-enrichment",
"parameters": [
{
"name": "domains[]",
"in": "query",
"description": "The domain of each company that you want to enrich. Do not include `www.`, the `@` symbol, or similar.