How to connect API Ninjas to Hermes Agent
Connect API Ninjas to Hermes with ClawLink: paste your API Ninjas key once and 246 tools work from chat. No MCP server to run, nothing stored on your machine.
API NinjasAPI KEYMCPAPI Ninjas offers over 120 unique APIs across various categories, enabling developers to build real applications with real data.. Once connected, Hermes Agent can read and act on API Ninjas from chat — pairing, token refresh, and tool wiring handled for you.
Most guides for giving Hermes Agent API Ninjas access start with registering your own OAuth app or pasting API keys into env files, then leave the token refresh and tool wiring to you. ClawLink gives Hermes a more practical API Ninjas setup: pair once in the browser and your always-on Hermes agent can act on API Ninjas for you, reading and doing real work on your behalf with no auth, token refresh, or tool wiring to build yourself.
Setup
It takes three steps to connect Hermes to API Ninjas.
- 1
Install and pair
Install the ClawLink plugin, then pair Hermes with a one-time browser approval:
hermes plugins install ClawLink-HQ/hermes-plugin --enable - 2
Connect API Ninjas
Paste your API key in the dashboard.
- 3
Use it from chat
Ask Hermes Agent: "What can you do with API Ninjas?"
Install by command
The prompt above walks Hermes through this. By hand, it is four commands and a browser approval:
hermes plugins install ClawLink-HQ/hermes-plugin --enable
hermes clawlink begin # prints an approval link — open it and approve
hermes clawlink finish # after approving in the browser
hermes clawlink testThen connect API Ninjas in the ClawLink dashboard — paste your API Ninjas API key once.
Verify the connection by asking Hermes:
Use API Ninjas to analyze sentiment and walk me through the result in plain English.
Using a different agent?
The Hermes plugin is one client of ClawLink's MCP server. Claude Code, Cursor, Codex, or any agent that can run a shell command pairs with the same ClawLink account through the CLI:
npx -y @useclawlink/cli loginlogin opens the same browser approval and stores a credential locally. Once API Ninjas is connected in the dashboard, that agent calls the same 246 API Ninjas tools over MCP. Full setup for MCP clients and shell agents: connect apps to any AI agent.
API Ninjas MCP for Hermes
Looking for a API Ninjas MCP server for Hermes Agent? ClawLink connects API Ninjas to Hermes Agent and exposes 246 API Ninjas tools your agent can call over MCP, with hosted auth and nothing to run or maintain yourself. Using OpenClaw instead? The OpenClaw API Ninjas integration works the same way.
What the Hermes Agent API Ninjas integration can do
246 API Ninjas tools are ready for Hermes Agent once the account is connected. The 30 below are the ones people reach for most; your agent can call all 246.
30 of 246 API Ninjas tools for Hermes
| Tool | What it does |
|---|---|
Analyze sentiment api_ninjas_analyze_sentiment | Analyze the sentiment of text |
Calculate calories burned api_ninjas_calculate_calories_burned | Calculate calories burned for an activity based on duration and body weight |
Calculate mortgage api_ninjas_calculate_mortgage | Calculate mortgage payments and breakdowns |
Calculate sales tax api_ninjas_calculate_sales_tax | Calculate sales tax for a purchase amount at a US location |
Check domain api_ninjas_check_domain | Check domain availability and retrieve registration information |
Analyze nutrition api_ninjas_analyze_nutrition | Extract nutrition information from text query |
Assess naics risk api_ninjas_assess_naics_risk | Assess documented compliance risk indicators for NAICS codes |
Calculate airport distance api_ninjas_calculate_airport_distance | Calculate great-circle distance, initial bearing, and estimated flight time between two airports |
Calculate currency volatility api_ninjas_calculate_currency_volatility | Calculate realized volatility and percentile context for a currency pair |
Calculate income tax api_ninjas_calculate_income_tax | Calculate income taxes for US and Canada |
Calculate paycheck withholding api_ninjas_calculate_paycheck_withholding | Calculate federal, FICA, and optional state paycheck withholding |
Check bank holiday api_ninjas_check_bank_holiday | Check whether banks are closed on a date in a country or subdivision |
Check disposable email api_ninjas_check_disposable_email | Check whether an email address is from a disposable email provider |
Check holiday api_ninjas_check_holiday | Return all documented holiday categories on a date across every country when country is |
Check is public holiday api_ninjas_check_is_public_holiday | Check if a specific date is a public holiday in a given country |
Check is working day api_ninjas_check_is_working_day | Check if a date is a working day in a specific country |
Check lottery ticket api_ninjas_check_lottery_ticket | Score a supported lottery ticket against a draw |
Check sales tax nexus api_ninjas_check_sales_tax_nexus | Evaluate supplied sales and transaction totals against a state's economic-nexus rules |
Check spelling api_ninjas_check_spelling | Check spelling and get corrections for text |
Classify business naics api_ninjas_classify_business_naics | Classify a business description to a NAICS code |
Compute text similarity api_ninjas_compute_text_similarity | Compute semantic similarity between two texts |
Convert airport code api_ninjas_convert_airport_code | Resolve an IATA, ICAO, GPS, ident, or local airport code to the matching airport record |
Convert currency api_ninjas_convert_currency | Convert between currencies using current exchange rates |
Convert unit api_ninjas_convert_unit | Convert between measurement units across different categories |
Detect faces api_ninjas_detect_faces | Detect faces and return their pixel bounding boxes in a JPEG or PNG image |
Detect objects api_ninjas_detect_objects | Detect labeled objects and bounding boxes in a JPEG or PNG image |
Detect text language api_ninjas_detect_text_language | Detect the language of input text |
Extract text from image api_ninjas_extract_text_from_image | Extract text blocks and pixel bounding boxes from a JPEG or PNG image |
Extract webpage content api_ninjas_extract_webpage_content | Extract main content and metadata from a webpage |
Filter profanity api_ninjas_filter_profanity | Detect and censor profanity in text |
Try it: find the API Ninjas tool you need
Browse the 30 API Ninjas tools
Click any tool to see exactly what Hermes can do and copy a ready-to-use prompt.
Example prompts
Use API Ninjas to analyze sentiment and walk me through the result in plain English.
ClawLink vs. building it yourself
The alternative to ClawLink is usually manual API key setup plus your own token handling, permission troubleshooting, and tool plumbing for Hermes Agent. That is fine if you want to build and maintain the integration yourself. Most teams just want API Ninjas working from chat.
| Manual | ClawLink | |
|---|---|---|
| Credential handling | Collect, validate, store, and rotate the API Ninjas API key yourself, then make sure every tool call uses the right account. | Users complete the hosted ClawLink setup once and the connected API Ninjas account becomes available to the agent without you building credential management. |
| Ongoing maintenance | You own refresh logic, permission debugging, environment config, and every provider-specific edge case for API Ninjas. | ClawLink handles the repetitive integration plumbing so your team can focus on the workflow instead of the infrastructure. |
| Agent usability | You still need to expose the right API Ninjas actions to the runtime in a format your agent can reliably use. | 246 tools for API Ninjas are already exposed through ClawLink, so the agent can read and act from chat immediately. |
ClawLink vs. Composio
Composio also exposes API Ninjas to AI agents. It is developer infrastructure: Python and TypeScript SDKs, an MCP server, and a catalog past 1,000 apps, aimed at teams shipping agent products. ClawLink is built for Hermes Agent users instead. You install the plugin once, connect API Ninjas in the browser, and the 246 tools above work from chat. There is no SDK and no config file, and the API Ninjas key you paste at setup is stored server-side rather than kept in your environment. Choosing between them? Read the full Composio alternatives comparison.
Troubleshooting
Hermes paired but still can't use API Ninjas
Pairing is a two-step handshake: run hermes clawlink begin, approve the link in your browser, then run hermes clawlink finish. If you ran finish before approving, or the approval link expired, run hermes clawlink begin again to get a fresh link. Confirm the plugin was installed with --enable, then verify with hermes clawlink test.
Connection succeeds but no tools appear
Reconnect API Ninjas from the dashboard, then start a fresh chat if the runtime still has the old tool catalog loaded.
"Tool schema not loaded yet" error when calling API Ninjas tools
API Ninjas tool schemas load on demand the first time a tool runs and are cached after that, so this error usually clears on its own: wait a few seconds and retry the same request. If every API Ninjas call keeps failing with it in a fresh chat, reconnect from the dashboard, and contact support if it still persists — that pattern points to a configuration problem on our side, not something you can fix by reconnecting again.
API Ninjas returns 403 or "permission denied" on one action while others work
Two usual causes. The connected account may not have access to the specific workspace, inbox, store, or project in the request — check that first. If access looks right, the agent may have sent a placeholder value (like "YOUR_ID" or an example id from documentation) instead of a real one: ask it to run a list or search tool first, then retry the action with a real id from those results. Most failures at this stage are one of these two, not ClawLink bugs.
API key setup works but results look incomplete
Double-check that the API key for API Ninjas has the right scopes or account access. A valid key can still be too limited for some reads or writes.
FAQ
Is there a Hermes Agent API Ninjas integration?
Yes. ClawLink is the fastest way to connect Hermes to API Ninjas: link your API Ninjas account once in the browser and Hermes Agent can call the API Ninjas API through 246 ready-made tools — no custom code or token handling.
How do I connect API Ninjas to Hermes with ClawLink?
Install the plugin with hermes plugins install ClawLink-HQ/hermes-plugin --enable, then pair once: run hermes clawlink begin, approve the link in your browser, and run hermes clawlink finish. Connect API Ninjas in the dashboard and Hermes can use it from the next message — no config files, and the API Ninjas key you paste is stored server-side instead of in your environment.
How long does it take to connect API Ninjas to Hermes Agent?
About two minutes. Sign in, click Connect next to API Ninjas in the dashboard, authenticate, and Hermes Agent can use it from the next chat message.
Why use ClawLink instead of wiring API Ninjas up myself?
The alternative to ClawLink is usually manual API key setup plus your own token handling, permission troubleshooting, and tool plumbing for Hermes Agent. That is fine if you want to build and maintain the integration yourself. Most teams just want API Ninjas working from chat.
Hermes paired but still can't use API Ninjas
Pairing is a two-step handshake: run hermes clawlink begin, approve the link in your browser, then run hermes clawlink finish. If you ran finish before approving, or the approval link expired, run hermes clawlink begin again to get a fresh link. Confirm the plugin was installed with --enable, then verify with hermes clawlink test.
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