---
name: "xpay-clinical-trials-search-trials-by-intervention"
description: "Search clinical trials by intervention/treatment.

This tool allows you to search for clinical trials based on a list of interventions or treatments.

Input:
  - `interventions`: A list of strings, where each string is an intervention or treatment to search for.
                     The search will find trials related to any of the specified interventions.
                     Example: `['aspirin', 'chemotherapy']`
  - `max_studies`: The maximum number of studies to return. Defaults to 50.
  - `fields`: A list of specific fields to return in the results. If not provided, returns
              SEARCH_TOOL_DEFAULTS (9 essential fields: NCTId, BriefTitle, Acronym, Condition,
              Phase, InterventionName, LeadSponsorName, OverallStatus, HasResults)."
version: "1.0.0"
price: "$0.01/call"
provider: "Clinical Trials"
---

# Search Trials By Intervention

Search clinical trials by intervention/treatment.

This tool allows you to search for clinical trials based on a list of interventions or treatments.

Input:
  - `interventions`: A list of strings, where each string is an intervention or treatment to search for.
                     The search will find trials related to any of the specified interventions.
                     Example: `['aspirin', 'chemotherapy']`
  - `max_studies`: The maximum number of studies to return. Defaults to 50.
  - `fields`: A list of specific fields to return in the results. If not provided, returns
              SEARCH_TOOL_DEFAULTS (9 essential fields: NCTId, BriefTitle, Acronym, Condition,
              Phase, InterventionName, LeadSponsorName, OverallStatus, HasResults).

**Provider:** Clinical Trials
**Price:** $0.01/call
**Pricing model:** Flat rate per call

## When to Use

Use this tool when you need to search clinical trials by intervention/treatment.

this tool allows you to search for clinical trials based on a list of interventions or treatments.

input:
  - `interventions`: a list of strings, where each string is an intervention or treatment to search for.
                     the search will find trials related to any of the specified interventions.
                     example: `['aspirin', 'chemotherapy']`
  - `max_studies`: the maximum number of studies to return. defaults to 50.
  - `fields`: a list of specific fields to return in the results. if not provided, returns
              search_tool_defaults (9 essential fields: nctid, brieftitle, acronym, condition,
              phase, interventionname, leadsponsorname, overallstatus, hasresults).. This is part of the Clinical Trials provider on xpay✦.

## MCP Connection

Connect to xpay✦ to access this tool (and 11+ others):

```json
{
  "mcpServers": {
    "xpay": {
      "url": "https://mcp.xpay.sh/mcp?key=YOUR_API_KEY"
    }
  }
}
```

For Claude Code:
```bash
claude mcp add --transport http xpay "https://mcp.xpay.sh/mcp?key=YOUR_API_KEY"
```

## How to Execute

Use the xpay✦ meta-tools to run this tool:

1. **`xpay_details`** — Get full input schema: `xpay_details("clinical-trials/search_trials_by_intervention")`
2. **`xpay_run`** — Execute: `xpay_run("clinical-trials/search_trials_by_intervention", { ...inputs })`

## Input Parameters

| Parameter | Type | Required | Description |
|-----------|------|----------|-------------|
| `fields` | string | No | Specific fields to return |
| `max_studies` | integer | No | Maximum number of studies to return |
| `interventions` | array | Yes | Interventions/treatments to search for |

## Pricing

- **Cost:** $0.01/call
- **Balance check:** Use `xpay_balance` to check remaining credits
- Get your API key at [xpay.tools](https://xpay.tools/account/settings/api-keys/) — $5 free credits included

## Related Skills

- [Clinical Trials (all tools)](https://xpay.tools/skills/clinical-trials/SKILL.md) — 12 tools
- [Search Trials By Condition](https://xpay.tools/skills/clinical-trials/search-trials-by-condition/SKILL.md) — $0.01/call
- [Search Trials By Sponsor](https://xpay.tools/skills/clinical-trials/search-trials-by-sponsor/SKILL.md) — $0.01/call
- [Search Trials By Acronym](https://xpay.tools/skills/clinical-trials/search-trials-by-acronym/SKILL.md) — $0.01/call
- [Search Trials By Nct Ids](https://xpay.tools/skills/clinical-trials/search-trials-by-nct-ids/SKILL.md) — $0.01/call
- [Search Trials Combined](https://xpay.tools/skills/clinical-trials/search-trials-combined/SKILL.md) — $0.01/call

## Links

- Tool page: https://xpay.tools/clinical-trials/search-trials-by-intervention/
- Provider: https://xpay.tools/clinical-trials/
- All tools: https://xpay.tools/explore