TinyFn
REMOTE · API.TINYFN.IO · SCANNED SEP 26
500+ deterministic tools for AI agents: math, conversion, validation, hashing, encoding, date/time.
Available components
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security57
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation not fully verified: no authorisation is required to call this server, and 572 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe. See how to fix → View diagnostics → Unverified
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability74
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 20780 tokens (~36/item across 572 items; 572 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
- Structured output schemas are declared (96% of tools); any adoption earns full credit.Pass
Tool Safety50
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- 0 of 9 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation; "truncate" implies "truncate" and declares no destructiveHint at all, which the MCP spec reads as destructive by default. See how to fix → Fail
- Manipulation not yet verified: only 564 of 573 captured unit(s) of tool text has been judged so far, so we will not certify text no model has read as clean.Unverified
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
How do I install the TinyFn MCP server?
TinyFn is a hosted endpoint at https://api.tinyfn.io/mcp/all/, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · api.tinyfn.io
claude mcp add --transport http io-tinyfn-tinyfn 'https://api.tinyfn.io/mcp/all/'
{
"mcpServers": {
"io-tinyfn-tinyfn": {
"url": "https://api.tinyfn.io/mcp/all/"
}
}
} {
"servers": {
"io-tinyfn-tinyfn": {
"type": "http",
"url": "https://api.tinyfn.io/mcp/all/"
}
}
} [mcp_servers.io-tinyfn-tinyfn] url = "https://api.tinyfn.io/mcp/all/"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"io-tinyfn-tinyfn": {
"type": "remote",
"url": "https://api.tinyfn.io/mcp/all/",
"enabled": true
}
}
} openclaw mcp add io-tinyfn-tinyfn --url 'https://api.tinyfn.io/mcp/all/' --transport streamable-http
mcp_servers:
io-tinyfn-tinyfn:
url: "https://api.tinyfn.io/mcp/all/" {
"McpServers": {
"io-tinyfn-tinyfn": {
"Transport": "http",
"Url": "https://api.tinyfn.io/mcp/all/"
}
}
} assistant mcp add io-tinyfn-tinyfn -t streamable-http -u 'https://api.tinyfn.io/mcp/all/'
{
"mcpServers": {
"io-tinyfn-tinyfn": {
"type": "http",
"url": "https://api.tinyfn.io/mcp/all/"
}
}
} The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 25 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 26 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 11 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 7 Aug 26 0
- The server no longer declares the “experimental” capability functional
- 31 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 30 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 28 Jul 26 0
- Stability: unverified → 0.03 ▲ functional
- 27 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 26 Sept 2026 · Probed https://api.tinyfn.io/mcp/all/
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=api.tinyfn.io | CN=YR2,O=Let's Encrypt,C=US | 25 Sept 2026 | 24 Dec 2026 | RSA 2048 | SHA256-RSA | 54eb566768cb74f3218eec54aa7ad821182 |
| SANs: api.tinyfn.io | ||||||
| CN=YR2,O=Let's Encrypt,C=US (CA) | CN=Root YR,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | RSA 2048 | SHA256-RSA | 4ebd24947e24d394802d84a52fd5b319 |
| CN=Root YR,O=ISRG,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | RSA 4096 | SHA256-RSA | f24b6d17f9d9ad7cb1c9fea78782699f |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of api.tinyfn.io. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| io. | present | 57355 | 8 | Verified |
| tinyfn.io. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://api.tinyfn.io/mcp/all/ | Verified | 200 | |
| http (plaintext) | http://api.tinyfn.io/mcp/all/ | HTTPS enforced | 301 | https://api.tinyfn.io/mcp/all/ |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
calculate_bmr ~74
Calculate Basal Metabolic Rate (BMR) using Mifflin-St Jeor equation.
| Name | Type | Req | Description |
|---|---|---|---|
| age | integer | yes | Age in years |
| height_cm | number | yes | Height in centimeters |
| sex | string | yes | Sex: male or female |
| weight_kg | number | yes | Weight in kilograms |
| Name | Type | Req | Description |
|---|---|---|---|
| age | integer | yes | – |
| bmr_calories | number | yes | – |
| height_cm | number | yes | – |
| sex | string | yes | – |
| tdee_by_activity | – | yes | – |
| weight_kg | number | yes | – |
No examples provided.
calculate_correlation ~38
Calculate Pearson correlation coefficient.
| Name | Type | Req | Description |
|---|---|---|---|
| x | string | yes | Comma-separated X values |
| y | string | yes | Comma-separated Y values |
| Name | Type | Req | Description |
|---|---|---|---|
| code | – | – | – |
| correlation | – | – | – |
| count | – | – | – |
| error | – | – | – |
| interpretation | – | – | – |
| r_squared | – | – | – |
| x | – | – | – |
| y | – | – | – |
No examples provided.
calculate_covariance ~50
Calculate covariance between two datasets.
| Name | Type | Req | Description |
|---|---|---|---|
| population | boolean | – | Population covariance vs sample |
| x | string | yes | Comma-separated X values |
| y | string | yes | Comma-separated Y values |
| Name | Type | Req | Description |
|---|---|---|---|
| code | – | – | – |
| count | – | – | – |
| covariance | – | – | – |
| error | – | – | – |
| type | – | – | – |
| x | – | – | – |
| y | – | – | – |
No examples provided.
calculate_discount ~32
Calculate discounted price.
| Name | Type | Req | Description |
|---|---|---|---|
| discount_percent | number | yes | Discount percentage |
| original_price | number | yes | Original price |
| Name | Type | Req | Description |
|---|---|---|---|
| discount_amount | number | yes | – |
| discount_percent | number | yes | – |
| final_price | number | yes | – |
| original_price | number | yes | – |
No examples provided.
calculate_macros ~40
Calculate macronutrient targets.
| Name | Type | Req | Description |
|---|---|---|---|
| calories | integer | yes | Daily calorie target |
| goal | string | – | Goal: lose, maintain, gain |
| Name | Type | Req | Description |
|---|---|---|---|
| calories | integer | yes | – |
| goal | string | yes | – |
| macros | – | yes | – |
No examples provided.
calculate_margin ~31
Calculate profit margin.
| Name | Type | Req | Description |
|---|---|---|---|
| cost | number | yes | Cost price |
| selling_price | number | yes | Selling price |
| Name | Type | Req | Description |
|---|---|---|---|
| cost | number | yes | – |
| margin_percent | number | yes | – |
| markup_percent | number | yes | – |
| profit | number | yes | – |
| selling_price | number | yes | – |
No examples provided.
calculate_markup ~36
Calculate selling price from cost and markup.
| Name | Type | Req | Description |
|---|---|---|---|
| cost | number | yes | Cost price |
| markup_percent | number | yes | Markup percentage |
| Name | Type | Req | Description |
|---|---|---|---|
| cost | number | yes | – |
| markup_percent | number | yes | – |
| profit | number | yes | – |
| selling_price | number | yes | – |
No examples provided.
calculate_mean ~25
Calculate arithmetic mean (average).
| Name | Type | Req | Description |
|---|---|---|---|
| numbers | string | yes | Comma-separated numbers |
| Name | Type | Req | Description |
|---|---|---|---|
| count | integer | yes | – |
| mean | number | yes | – |
| numbers | array | yes | – |
No examples provided.
calculate_median ~23
Calculate median.
| Name | Type | Req | Description |
|---|---|---|---|
| numbers | string | yes | Comma-separated numbers |
| Name | Type | Req | Description |
|---|---|---|---|
| count | integer | yes | – |
| median | number | yes | – |
| numbers | array | yes | – |
No examples provided.
calculate_midpoint ~68
Calculate geographic midpoint between two coordinates.
| Name | Type | Req | Description |
|---|---|---|---|
| lat1 | number | yes | Latitude of point 1 |
| lat2 | number | yes | Latitude of point 2 |
| lon1 | number | yes | Longitude of point 1 |
| lon2 | number | yes | Longitude of point 2 |
| Name | Type | Req | Description |
|---|---|---|---|
| midpoint | – | yes | – |
| point1 | – | yes | – |
| point2 | – | yes | – |
No examples provided.
calculate_mode ~26
Calculate mode (most frequent value).
| Name | Type | Req | Description |
|---|---|---|---|
| numbers | string | yes | Comma-separated numbers |
| Name | Type | Req | Description |
|---|---|---|---|
| frequency | integer | yes | – |
| is_multimodal | boolean | yes | – |
| mode | – | yes | – |
| numbers | array | yes | – |
No examples provided.
calculate_percentile ~36
Calculate a specific percentile.
| Name | Type | Req | Description |
|---|---|---|---|
| numbers | string | yes | Comma-separated numbers |
| percentile | number | yes | Percentile to calculate |
| Name | Type | Req | Description |
|---|---|---|---|
| count | integer | yes | – |
| numbers | array | yes | – |
| percentile | number | yes | – |
| value | number | yes | – |
No examples provided.
calculate_product ~24
Calculate product of numbers.
| Name | Type | Req | Description |
|---|---|---|---|
| numbers | string | yes | Comma-separated numbers |
| Name | Type | Req | Description |
|---|---|---|---|
| count | integer | yes | – |
| numbers | array | yes | – |
| product | number | yes | – |
No examples provided.
calculate_quartiles ~34
Calculate quartiles (Q1, Q2, Q3).
| Name | Type | Req | Description |
|---|---|---|---|
| numbers | string | yes | Comma-separated numbers |
| Name | Type | Req | Description |
|---|---|---|---|
| count | integer | yes | – |
| iqr | number | yes | – |
| max | number | yes | – |
| min | number | yes | – |
| numbers | array | yes | – |
| q1 | number | yes | – |
| q2_median | number | yes | – |
| q3 | number | yes | – |
No examples provided.
calculate_range ~26
Calculate range (max - min).
| Name | Type | Req | Description |
|---|---|---|---|
| numbers | string | yes | Comma-separated numbers |
| Name | Type | Req | Description |
|---|---|---|---|
| max | number | yes | – |
| min | number | yes | – |
| numbers | array | yes | – |
| range | number | yes | – |
No examples provided.
calculate_stddev ~39
Calculate standard deviation.
| Name | Type | Req | Description |
|---|---|---|---|
| numbers | string | yes | Comma-separated numbers |
| population | boolean | – | Use population std dev vs sample std dev |
| Name | Type | Req | Description |
|---|---|---|---|
| count | integer | yes | – |
| mean | number | yes | – |
| numbers | array | yes | – |
| standard_deviation | number | yes | – |
| type | string | yes | – |
| variance | number | yes | – |
No examples provided.
calculate_sum ~24
Calculate sum of numbers.
| Name | Type | Req | Description |
|---|---|---|---|
| numbers | string | yes | Comma-separated numbers |
| Name | Type | Req | Description |
|---|---|---|---|
| count | integer | yes | – |
| numbers | array | yes | – |
| sum | number | yes | – |
No examples provided.
calculate_tip ~45
Calculate tip and split bill.
| Name | Type | Req | Description |
|---|---|---|---|
| amount | number | yes | Bill amount |
| split | integer | – | Number of people to split |
| tip_percent | number | – | Tip percentage |
| Name | Type | Req | Description |
|---|---|---|---|
| bill_amount | number | yes | – |
| per_person | number | yes | – |
| split_ways | integer | yes | – |
| tip_amount | number | yes | – |
| tip_percent | number | yes | – |
| total | number | yes | – |
No examples provided.
calculate_variance ~43
Calculate variance.
| Name | Type | Req | Description |
|---|---|---|---|
| numbers | string | yes | Comma-separated numbers |
| population | boolean | – | Use population variance (N) vs sample variance (N-1) |
| Name | Type | Req | Description |
|---|---|---|---|
| count | integer | yes | – |
| mean | number | yes | – |
| numbers | array | yes | – |
| type | string | yes | – |
| variance | number | yes | – |
No examples provided.
calculate_vat ~46
Calculate VAT (Value Added Tax).
| Name | Type | Req | Description |
|---|---|---|---|
| amount | number | yes | Amount |
| inclusive | boolean | – | Is amount VAT inclusive? |
| vat_rate | number | – | VAT rate percentage |
| Name | Type | Req | Description |
|---|---|---|---|
| gross_amount | number | yes | – |
| net_amount | number | yes | – |
| vat_amount | number | yes | – |
| vat_rate | number | yes | – |
No examples provided.
calculate_zscore ~49
Calculate z-score (standard score).
| Name | Type | Req | Description |
|---|---|---|---|
| mean | number | yes | Population mean |
| stddev | number | yes | Population standard deviation |
| value | number | yes | Value to calculate z-score for |
| Name | Type | Req | Description |
|---|---|---|---|
| mean | number | yes | – |
| standard_deviation | number | yes | – |
| value | number | yes | – |
| z_score | number | yes | – |
No examples provided.
calories_burned ~49
Estimate calories burned during activities.
| Name | Type | Req | Description |
|---|---|---|---|
| activity | string | yes | Activity type |
| duration_minutes | integer | yes | Duration in minutes |
| weight_kg | number | yes | Body weight in kg |
| Name | Type | Req | Description |
|---|---|---|---|
| activity | – | – | – |
| available_activities | – | – | – |
| calories_burned | – | – | – |
| duration_minutes | – | – | – |
| error | – | – | – |
| met_value | – | – | – |
| weight_kg | – | – | – |
No examples provided.
camel_case ~25
Convert text to camelCase.
| Name | Type | Req | Description |
|---|---|---|---|
| text | string | yes | The text to convert |
| Name | Type | Req | Description |
|---|---|---|---|
| camel_case | string | yes | – |
| original | string | yes | – |
No examples provided.
capitalize ~27
Capitalize the first letter of each word.
| Name | Type | Req | Description |
|---|---|---|---|
| text | string | yes | The text to capitalize |
| Name | Type | Req | Description |
|---|---|---|---|
| capitalized | string | yes | – |
| original | string | yes | – |
No examples provided.
capitalize_text ~24
Capitalize first letter only.
| Name | Type | Req | Description |
|---|---|---|---|
| text | string | yes | Text to capitalize |
No output schema declared.
No examples provided.
ceil ~23
Round up to nearest integer.
| Name | Type | Req | Description |
|---|---|---|---|
| number | number | yes | Number to ceil |
| Name | Type | Req | Description |
|---|---|---|---|
| number | number | yes | – |
| result | integer | yes | – |
No examples provided.
celsius_to_fahrenheit ~27
Convert Celsius to Fahrenheit.
| Name | Type | Req | Description |
|---|---|---|---|
| celsius | number | yes | Temperature in Celsius |
| Name | Type | Req | Description |
|---|---|---|---|
| celsius | number | yes | – |
| fahrenheit | number | yes | – |
No examples provided.
celsius_to_kelvin ~27
Convert Celsius to Kelvin.
| Name | Type | Req | Description |
|---|---|---|---|
| celsius | number | yes | Temperature in Celsius |
| Name | Type | Req | Description |
|---|---|---|---|
| celsius | number | yes | – |
| kelvin | number | yes | – |
No examples provided.
centimeters_to_inches ~24
Convert centimeters to inches.
| Name | Type | Req | Description |
|---|---|---|---|
| centimeters | number | yes | Length in centimeters |
| Name | Type | Req | Description |
|---|---|---|---|
| centimeters | number | yes | – |
| inches | number | yes | – |
No examples provided.
chunk_array ~36
Split items into chunks of specified size.
| Name | Type | Req | Description |
|---|---|---|---|
| items | string | yes | Comma-separated items |
| size | integer | – | Chunk size |
| Name | Type | Req | Description |
|---|---|---|---|
| chunk_size | integer | yes | – |
| chunks | array | yes | – |
| num_chunks | integer | yes | – |
| original | array | yes | – |
No examples provided.
cidr_info ~42
Get information about a CIDR range.
| Name | Type | Req | Description |
|---|---|---|---|
| cidr | string | yes | CIDR notation (e.g., 192.168.1.0/24) |
| Name | Type | Req | Description |
|---|---|---|---|
| broadcast_address | – | – | – |
| cidr | – | – | – |
| code | – | – | – |
| error | – | – | – |
| first_host | – | – | – |
| hostmask | – | – | – |
| is_private | – | – | – |
| last_host | – | – | – |
| netmask | – | – | – |
| network_address | – | – | – |
| num_addresses | – | – | – |
| num_hosts | – | – | – |
| prefix_length | – | – | – |
| version | – | – | – |
No examples provided.
cidr_to_netmask ~35
Convert CIDR prefix length to subnet mask.
| Name | Type | Req | Description |
|---|---|---|---|
| prefix | integer | yes | CIDR prefix length (0-32) |
| Name | Type | Req | Description |
|---|---|---|---|
| cidr_prefix | integer | yes | – |
| netmask | string | yes | – |
| total_hosts | integer | yes | – |
| wildcard_mask | string | yes | – |
No examples provided.
clamp ~43
Clamp a number within a range.
| Name | Type | Req | Description |
|---|---|---|---|
| maximum | number | yes | Maximum value |
| minimum | number | yes | Minimum value |
| number | number | yes | The number to clamp |
| Name | Type | Req | Description |
|---|---|---|---|
| clamped | number | yes | – |
| max | number | yes | – |
| min | number | yes | – |
| number | number | yes | – |
No examples provided.
cmyk_to_hex ~69
Convert CMYK to hex color.
| Name | Type | Req | Description |
|---|---|---|---|
| c | integer | yes | Cyan (0-100) |
| k | integer | yes | Key/Black (0-100) |
| m | integer | yes | Magenta (0-100) |
| y | integer | yes | Yellow (0-100) |
| Name | Type | Req | Description |
|---|---|---|---|
| cmyk | – | yes | – |
| hex | string | yes | – |
| rgb | – | yes | – |
No examples provided.
collatz_sequence ~26
Generate Collatz sequence for a number.
| Name | Type | Req | Description |
|---|---|---|---|
| number | integer | yes | Starting number |
| Name | Type | Req | Description |
|---|---|---|---|
| length | integer | yes | – |
| max_value | integer | yes | – |
| sequence | array | yes | – |
| start | integer | yes | – |
No examples provided.
compare ~45
Compare two numbers (e.g., is 0.9 greater than 0.11?).
| Name | Type | Req | Description |
|---|---|---|---|
| a | number | yes | First number |
| b | number | yes | Second number |
| Name | Type | Req | Description |
|---|---|---|---|
| a | number | yes | – |
| a_is_greater | boolean | yes | – |
| a_is_less | boolean | yes | – |
| absolute_difference | number | yes | – |
| are_equal | boolean | yes | – |
| b | number | yes | – |
| comparison | string | yes | – |
| description | string | yes | – |
| difference | number | yes | – |
| ratio | – | – | – |
| symbol | string | yes | – |
No examples provided.
compare_2 ~31
Compare two values.
| Name | Type | Req | Description |
|---|---|---|---|
| a | string | yes | First value |
| b | string | yes | Second value |
| Name | Type | Req | Description |
|---|---|---|---|
| a | string | yes | – |
| a_greater | – | – | – |
| a_length | – | – | – |
| b | string | yes | – |
| b_greater | – | – | – |
| b_length | – | – | – |
| difference | – | – | – |
| equal | boolean | yes | – |
| equal_ignore_case | – | – | – |
| type | string | yes | – |
No examples provided.
compare_decimals ~52
Compare decimal numbers with detailed explanation (handles 0.9 vs 0.11 correctly).
| Name | Type | Req | Description |
|---|---|---|---|
| a | string | yes | First decimal number as string |
| b | string | yes | Second decimal number as string |
| Name | Type | Req | Description |
|---|---|---|---|
| a | – | – | – |
| a_as_float | – | – | – |
| b | – | – | – |
| b_as_float | – | – | – |
| code | – | – | – |
| comparison | – | – | – |
| description | – | – | – |
| difference | – | – | – |
| error | – | – | – |
| explanation | – | – | – |
| larger_number | – | – | – |
| symbol | – | – | – |
No examples provided.
compare_hashes ~40
Compare two hashes in constant time (timing-safe).
| Name | Type | Req | Description |
|---|---|---|---|
| hash1 | string | yes | First hash |
| hash2 | string | yes | Second hash |
| Name | Type | Req | Description |
|---|---|---|---|
| are_equal | boolean | yes | – |
| comparison_method | string | yes | – |
| hash1 | string | yes | – |
| hash2 | string | yes | – |
No examples provided.
complement_color ~33
Get the complementary color (opposite on color wheel).
| Name | Type | Req | Description |
|---|---|---|---|
| hex_color | string | yes | Hex color to get complement of |
| Name | Type | Req | Description |
|---|---|---|---|
| complement | string | yes | – |
| original | string | yes | – |
No examples provided.
compound_interest ~67
Calculate compound interest.
| Name | Type | Req | Description |
|---|---|---|---|
| compounds_per_year | integer | – | Compounding frequency per year |
| principal | number | yes | Initial principal |
| rate | number | yes | Annual interest rate (as percentage, e.g., 5 for 5%) |
| time | number | yes | Time in years |
| Name | Type | Req | Description |
|---|---|---|---|
| compounds_per_year | integer | yes | – |
| effective_annual_rate | number | yes | – |
| final_amount | number | yes | – |
| interest_earned | number | yes | – |
| principal | number | yes | – |
| rate_percent | number | yes | – |
| time_years | number | yes | – |
No examples provided.
constant_time_compare ~38
Compare two strings in constant time (timing-safe).
| Name | Type | Req | Description |
|---|---|---|---|
| a | string | yes | First string |
| b | string | yes | Second string |
| Name | Type | Req | Description |
|---|---|---|---|
| equal | boolean | yes | – |
| note | string | yes | – |
No examples provided.
contains ~49
Check if text contains a substring.
| Name | Type | Req | Description |
|---|---|---|---|
| case_sensitive | boolean | – | Case sensitive search |
| search | string | yes | The text to search for |
| text | string | yes | The text to search in |
| Name | Type | Req | Description |
|---|---|---|---|
| case_sensitive | boolean | yes | – |
| contains | boolean | yes | – |
| search | string | yes | – |
| text | string | yes | – |
No examples provided.
contrast_ratio ~40
Calculate contrast ratio between two colors (WCAG).
| Name | Type | Req | Description |
|---|---|---|---|
| color1 | string | yes | First hex color |
| color2 | string | yes | Second hex color |
| Name | Type | Req | Description |
|---|---|---|---|
| color1 | string | yes | – |
| color2 | string | yes | – |
| contrast_ratio | number | yes | – |
| wcag_aa_large | boolean | yes | – |
| wcag_aa_normal | boolean | yes | – |
| wcag_aaa_large | boolean | yes | – |
| wcag_aaa_normal | boolean | yes | – |
No examples provided.
convert_all_cases ~28
Convert text to all case formats at once.
| Name | Type | Req | Description |
|---|---|---|---|
| text | string | yes | Text to convert |
| Name | Type | Req | Description |
|---|---|---|---|
| conversions | object | yes | – |
| original | string | yes | – |
No examples provided.
convert_timestamp ~25
Convert Unix timestamp to date.
| Name | Type | Req | Description |
|---|---|---|---|
| timestamp | integer | yes | Unix timestamp (seconds) |
| Name | Type | Req | Description |
|---|---|---|---|
| date | string | yes | – |
| day_of_week | string | yes | – |
| iso | string | yes | – |
| time | string | yes | – |
| timestamp | integer | yes | – |
No examples provided.
convert_timestamp_ms ~30
Convert Unix timestamp (milliseconds) to date.
| Name | Type | Req | Description |
|---|---|---|---|
| timestamp_ms | integer | yes | Unix timestamp (milliseconds) |
| Name | Type | Req | Description |
|---|---|---|---|
| date | string | yes | – |
| iso | string | yes | – |
| time | string | yes | – |
| timestamp | integer | yes | – |
| timestamp_ms | integer | yes | – |
No examples provided.
convert_timezone ~49
Convert datetime between timezones.
| Name | Type | Req | Description |
|---|---|---|---|
| datetime_str | string | yes | Datetime in ISO format |
| from_tz | string | – | Source timezone |
| to_tz | string | – | Target timezone |
| Name | Type | Req | Description |
|---|---|---|---|
| converted | – | – | – |
| date | – | – | – |
| error | – | – | – |
| from_timezone | – | – | – |
| original | – | – | – |
| time | – | – | – |
| to_timezone | – | – | – |
No examples provided.
cos ~24
Calculate the cosine of an angle.
| Name | Type | Req | Description |
|---|---|---|---|
| angle | number | yes | Angle in radians |
| Name | Type | Req | Description |
|---|---|---|---|
| angle_radians | number | yes | – |
| cos | number | yes | – |
No examples provided.
count_all_chars ~28
Count occurrences of each character in text.
| Name | Type | Req | Description |
|---|---|---|---|
| text | string | yes | The text to analyze |
| Name | Type | Req | Description |
|---|---|---|---|
| character_counts | object | yes | – |
| digits | integer | yes | – |
| letters | integer | yes | – |
| punctuation | integer | yes | – |
| spaces | integer | yes | – |
| text | string | yes | – |
| total_characters | integer | yes | – |
| unique_characters | integer | yes | – |
No examples provided.
What is the TinyFn MCP server?
TinyFn is an MCP server listed in the public MCP registry as io.tinyfn/tinyfn. 500+ deterministic tools for AI agents: math, conversion, validation, hashing, encoding, date/time. This page covers its hosted endpoint (https://api.tinyfn.io/mcp/all/).
Is the TinyFn MCP server safe to use?
TinyFn scores 75 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the TinyFn MCP server expose?
TinyFn exposes 572 tools: is_even, is_odd, is_prime, is_positive, is_negative, and 567 more. Their descriptions and schemas cost roughly 20,637 tokens of context every time the server is loaded.
Does the TinyFn MCP server require authentication?
No. We connected to TinyFn without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the TinyFn MCP server still maintained?
TinyFn is still listed as active in the MCP registry. We last reached this channel on 26 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.