TinyFn MCP server

Which servers in the official MCP registry are TinyFn's own, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-17

← Back to TinyFn

Whose server it is

Registry nameio.tinyfn/tinyfnverified in the MCP registry

The registry name sits under tinyfn.io. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-17

Stateanswerschecked 2026-10-17
Tools572
Server calls itselfTinyFn
Server version2.14.4
Protocol version2025-06-18

On 2026-10-17 the server answered initialize and tools/list without a sign-in. First answer in 162 ms.

Should an agent connect itNot proven either way yet

Whether its tools do the product's job has not been judged yet.
Checked on 4 of the 7 days it takes to judge reliability.

Once connected

Keep approval on for truncate, truncate_2, remove_whitespace, remove_duplicate_words, remove_query_param: they delete, send or pay without saying so.
add, remove_whitespace, add_time, add_time_2, add_business_days change data without a sign-in: anyone with the address can call them.
Its definitions take about 29081 tokens of context: enable only the tools a task needs.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 4, the first on 2026-10-19

INITE MCP scoreafter a weeka score needs 7 daily checks: 4 so far
Use1 GitHub stars
Answeredmeasuring4 of the 7 daily checks it takes to print a share
Median first answer177 ms
Space in an agent's context≈ 29,081 tokensthe definitions of all its tools (400), which an agent carries on every turn
Tool definitionsB · 83 of 100
Typed results381 of 400 toolsdeclared outputSchema: results come typed, read once

No description an agent can choose by: 14 of 400
Not saying whether it only reads or can destroy: 400 of 400

Worth a look

Tools that delete, send or pay without telling the client so: truncate, truncate_2, remove_whitespace, remove_duplicate_words, remove_query_param
Tools that change data, on a server that answers without a sign-in: add, remove_whitespace, add_time, add_time_2, add_business_days

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (30%), doing the product's job (25%), definitions (20%), context (10%) and use (15%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers572 tools · read 2026-10-17

is_even
Check if a number is even.
is_odd
Check if a number is odd.
is_prime
Check if a number is prime.
is_positive
Check if a number is positive.
is_negative
Check if a number is negative.
is_zero
Check if a number is zero.
is_integer
Check if a number is an integer.
is_divisible
Check if a number is divisible by another number.
is_perfect_square
Check if a number is a perfect square.
is_fibonacci
Check if a number is a Fibonacci number.
factorial
Calculate the factorial of a number.
fibonacci
Get the nth Fibonacci number.
gcd
Calculate the greatest common divisor.
lcm
Calculate the least common multiple.
absolute_value
Get the absolute value of a number.
square_root
Calculate the square root of a number.
power
Calculate base raised to the power of exponent.
percentage
Calculate what percentage value is of total.
average
Calculate the average of a list of numbers.
round_number
Round a number to specified decimal places.
clamp
Clamp a number within a range.
distance
Calculate Euclidean distance between two points.
sin
Calculate the sine of an angle.
cos
Calculate the cosine of an angle.
tan
Calculate the tangent of an angle.
deg_to_rad
Convert degrees to radians.
rad_to_deg
Convert radians to degrees.
add
Add two or more numbers together.
subtract
Subtract b from a.
multiply
Multiply two or more numbers together.
divide
Divide a by b.
modulo
Calculate a modulo b (remainder of a divided by b).
log
Calculate logarithm. Natural log if no base specified.
log10
Calculate base-10 logarithm.
log2
Calculate base-2 logarithm.
exp
Calculate e raised to the power of number.
floor
Round down to nearest integer.
ceil
Round up to nearest integer.
minimum
Find the minimum value.
maximum
Find the maximum value.
sum_numbers
Calculate the sum of numbers.
sign
Get the sign of a number (-1, 0, or 1).
truncate
Truncate to integer (remove decimal part).
hypotenuse
Calculate the hypotenuse of a right triangle.
cube
Calculate the cube of a number.
cube_root
Calculate the cube root of a number.
square
Calculate the square of a number.
nth_root
Calculate the nth root of a number.
compare
Compare two numbers (e.g., is 0.9 greater than 0.11?).
compare_decimals
Compare decimal numbers with detailed explanation (handles 0.9 vs 0.11 correctly).
rank_numbers
Rank a list of numbers from largest to smallest (or vice versa).
is_between
Check if a number is between two bounds.
reverse_string
Reverse a string.
uppercase
Convert text to uppercase.
lowercase
Convert text to lowercase.
capitalize
Capitalize the first letter of each word.
title_case
Convert text to title case.
sentence_case
Convert text to sentence case.
camel_case
Convert text to camelCase.
snake_case
Convert text to snake_case.

The first 60 of 572, as the server listed them.

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "tinyfn": {
      "type": "http",
      "url": "https://api.tinyfn.io/mcp/all/"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http tinyfn https://api.tinyfn.io/mcp/all/

Add to Cursor Add to VS Code

claude.ai, ChatGPT and other clients: add https://api.tinyfn.io/mcp/all/ as a custom connector in the settings.

OpenAPI spec

572 paths, read 2026-10-17. Open the spec ↗

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.