Introduction - Signalbase Documentation

Welcome to the Funding Signals API

The Funding Signals API provides access to comprehensive, real-time funding signals aggregated from across the web. Our platform continuously monitors and collects funding activity, giving you up-to-date information on companies raising capital, funding rounds, investors, and market trends.

Funding Signals Endpoint

View the complete OpenAPI specification

Count Mode

You can get the total number of results matching any filter combination without consuming credits by adding count=true to your request. This returns an empty data array with full pagination metadata, including totalCount.

curl -X GET "https://www.trysignalbase.com/api/v2/signals/funding?count=true&countries=US&round=Seed" \
  -H "Authorization: Bearer YOUR_API_KEY"

Response:

{
  "success": true,
  "data": [],
  "pagination": {
    "currentPage": 1,
    "totalPages": 15,
    "totalCount": 287,
    "hasNextPage": true,
    "hasPreviousPage": false
  },
  "meta": {
    "endpoint": "signals.funding",
    "creditsUsed": 0
  }
}

Use count mode to preview how many results match your filters before fetching actual data. This is useful for building filter UIs, showing result counts, or validating queries — all at zero credit cost.

Key Features

Real-time Signals: Funding signals are aggregated continuously from web sources
Advanced Filtering: Filter by countries, categories, subcategories, funding rounds, date ranges, and search terms
Funding Round Types: Filter by round type (e.g. seed, series a, pre-seed, angel) — case-insensitive. See Round Types
Round Flavors: Distinguish between bridge, extension, and secondary rounds
Numeric Range Filters: Filter by amount, employee count, and founded year
Flexible Sorting: Sort by date, amount, employee count, or founded year
Verification Status: Filter signals by verified, unverified, or pending status
Pagination Support: Efficiently retrieve large datasets with up to 100 results per page
Credit-based Usage: Transparent credit consumption per API call

Company fields in responses

Funding signal payloads include companyCountry for HQ and companySubcategory when classified. Conventions match the other signal APIs; see Company fields in signal responses.

Service Level

Rate Limit: Based on your subscription tier
Uptime: 99% guaranteed uptime
Data Freshness: Real-time aggregation ensures up-to-date signals
Maximum Results: Up to 100 results per page

Authentication

All API endpoints require authentication using a Bearer token passed in the Authorization header.

curl -X GET "https://www.trysignalbase.com/api/v2/signals/funding?page=1&limit=20&round=Series%20A" \
  -H "Authorization: Bearer YOUR_API_KEY"

Matching by Company URL (Recommended)

If you know a company’s website domain or LinkedIn page, query by URL instead of by name. Name search is fuzzy and can return lookalikes (Novartis also matches Novartis UK); URL identifiers match exactly one company.

# By website domain
curl -X GET "https://www.trysignalbase.com/api/v2/signals/funding?company_domain=novartis.com" \
  -H "Authorization: Bearer YOUR_API_KEY"

# By LinkedIn company page
curl -X GET "https://www.trysignalbase.com/api/v2/signals/funding?company_linkedin_url=linkedin.com/company/novartis" \
  -H "Authorization: Bearer YOUR_API_KEY"

Accepted input formats. URL identifiers are normalized before matching, so equivalent variants return the same results:

company_domain: novartis.com, www.novartis.com, https://www.novartis.com/, https://novartis.com/any/path — scheme, www., port, path and trailing slash are ignored. Values that can’t be reduced to a domain return 400.
company_linkedin_url: linkedin.com/company/novartis, https://www.linkedin.com/company/Novartis/ — http/https, www. and trailing slash are ignored, the slug is case-insensitive. URLs that aren’t LinkedIn company pages (e.g. personal /in/ profiles) return 400.

Strict matching. When a URL identifier is provided, the API never falls back to fuzzy name matching: if no company matches, the result is empty. Identifiers combine with AND — company_domain=novartis.com&company_name=Acme returns empty because they disagree. Match confidence. Every result row includes match_confidence:

Value	Meaning
`exact`	Matched via `company_domain` or `company_linkedin_url`
`fuzzy`	Matched via `company_name` partial match only
`none`	No company identifier was part of the query

Query Parameters

Pagination

Parameter	Type	Default	Description
`page`	integer	1	Page number
`limit`	integer	20	Results per page (max: 100)

Date Filters

Parameter	Type	Description
`dateFrom`	string	Filter by date from (ISO-8601 string)
`dateTo`	string	Filter by date to (ISO-8601 string)
`date_preset`	string	Relative date shorthand — takes precedence over `dateFrom`/`dateTo`. See Date Presets

Company Filters

Parameter	Type	Description
`countries`	string	Comma-separated country codes (e.g., `US,GB,DE`). Allowlist
`exclude_countries`	string	Comma-separated country names or codes to exclude (denylist, e.g. `China` or `CN`). Complements `countries`; companies with an unknown HQ country are kept
`categories`	string	Pipe-separated company categories / industries
`subcategories`	string	Comma-separated subcategory IDs (e.g., `ai,fintech,saas`)
`industry`	string	Comma-separated exact industry names
`company_domain`	string	Recommended. Company website domain (e.g. `novartis.com`). Strict match — see Matching by company URL
`company_linkedin_url`	string	Recommended. LinkedIn company URL (e.g. `linkedin.com/company/novartis`). Strict match
`company_name`	string	Search by company name (partial match, fuzzy). Prefer the URL identifiers above
`search`	string	Free-text search across company name & industry

Numeric Range Filters

Parameter	Type	Description
`amount_min`	integer	Minimum funding amount in whole units of the deal’s currency (not cents)
`amount_max`	integer	Maximum funding amount in whole units of the deal’s currency (not cents)
`employee_count_min`	integer	Minimum company employee count
`employee_count_max`	integer	Maximum company employee count
`founded_year_min`	integer	Minimum company founded year
`founded_year_max`	integer	Maximum company founded year

Funding-specific Filters

Parameter	Type	Description
`round`	string	Comma-separated round types. See Round Types
`round_flavor`	string	Comma-separated round flavors: `bridge`, `extension`, `secondary`
`currency`	string	Filter by ISO 4217 currency code (e.g., `USD`, `EUR`, `GBP`). See Currency Values
`verification_status`	string	Comma-separated statuses: `verified`, `unverified`, `pending`
`investor_name`	string	Search by investor name (partial match)

Sorting

Parameter	Type	Default	Description
`sort_by`	string	`occurred_at`	Sort field: `occurred_at`, `discovered_at`, `amount`, `employee_count`, `founded_year`
`sort_order`	string	`desc`	Sort direction: `asc` or `desc`

Funding Round Types

Round types are matched case-insensitively (Series A, series a, and SERIES A all work) and returned in lowercase. The most common values:

seed, pre-seed — early-stage funding
series a … series f — priced venture rounds (later letters also occur)
angel — angel/individual investment
equity, fund, debt financing, debt — other financing types
ipo — initial public offering

See Round Types for the full common list.

Response Structure

All successful responses follow this structure:

{
  "success": true,
  "data": [
    {
      "signalId": "uuid-here",
      "companyName": "TechStartup Inc",
      "roundType": "series a",
      "fundingAmount": 10000000,
      "investorNames": ["VC Fund 1", "Angel Investor 2"],
      ...
    }
  ],
  "pagination": {
    "currentPage": 1,
    "totalPages": 10,
    "totalCount": 200,
    "hasNextPage": true,
    "hasPreviousPage": false
  },
  "meta": {
    "endpoint": "signals.funding",
    "creditsUsed": 1
  }
}

Error Handling

The API returns standard HTTP status codes:

200: Success
401: Unauthorized - Invalid or missing API key
429: Rate limit exceeded
500: Internal server error

Error responses include:

{
  "success": false,
  "error": "Error message description"
}

Example Usage

Filter by Date Preset and Round Type

curl -X GET "https://www.trysignalbase.com/api/v2/signals/funding?date_preset=last_30d&countries=US&round=Seed,Series%20A" \
  -H "Authorization: Bearer YOUR_API_KEY"

Filter by Amount and Employee Count

curl -X GET "https://www.trysignalbase.com/api/v2/signals/funding?amount_min=1000000&employee_count_max=50&sort_by=amount&sort_order=desc" \
  -H "Authorization: Bearer YOUR_API_KEY"

Filter by Subcategory and Verification Status

curl -X GET "https://www.trysignalbase.com/api/v2/signals/funding?subcategories=ai,fintech&verification_status=verified" \
  -H "Authorization: Bearer YOUR_API_KEY"

Search with Multiple Filters

curl -X GET "https://www.trysignalbase.com/api/v2/signals/funding?search=fintech&countries=US&round=Series%20A&sort_by=amount&sort_order=desc&limit=50" \
  -H "Authorization: Bearer YOUR_API_KEY"

​Welcome to the Funding Signals API

Funding Signals Endpoint

​Count Mode

​Key Features

​Company fields in responses

​Service Level

​Authentication

​Matching by Company URL (Recommended)

​Query Parameters

​Pagination

​Date Filters

​Company Filters

​Numeric Range Filters

​Funding-specific Filters

​Sorting

​Funding Round Types

​Response Structure

​Error Handling

​Example Usage

​Filter by Date Preset and Round Type

​Filter by Amount and Employee Count

​Filter by Subcategory and Verification Status

​Search with Multiple Filters

Welcome to the Funding Signals API

Count Mode

Key Features

Company fields in responses

Service Level

Authentication

Matching by Company URL (Recommended)

Query Parameters

Pagination

Date Filters

Company Filters

Numeric Range Filters

Funding-specific Filters

Sorting

Funding Round Types

Response Structure

Error Handling

Example Usage

Filter by Date Preset and Round Type

Filter by Amount and Employee Count

Filter by Subcategory and Verification Status

Search with Multiple Filters