RunDida API

Free, open JSON endpoints for running data. No API key required. Perfect for running apps, AI agents, and developers building training tools.

Quick Start

All endpoints return JSON and require no authentication. Data is pre-generated at build time for maximum speed.

curl https://rundida.com/api/tools.json

Endpoints

Tools

Endpoint	Description
`/api/tools.json`	List of all 98 running tools with metadata
`/api/tools/{slug}.json`	Full detail for a specific tool including FAQs, related tools, and sources

Marathons

Endpoint	Description
`/api/marathons.json`	All 324 active and archived marathon events
`/api/marathons/{id}.json`	Full detail for a marathon including Schema.org SportsEvent data

Guides

Endpoint	Description
`/api/guides.json`	All 53 running guides with metadata

Calculations

For live calculations (pace, heart rate zones, race predictions, VO2max, splits, calories, distance conversion), use the MCP Server below. It performs all computations locally using established running science formulas.

Feeds

Endpoint	Format
`/feed.xml`	RSS 2.0 feed of all tools and guides
`/feed.json`	JSON Feed 1.1 of all tools and guides
`/llms.txt`	AI/LLM discovery protocol (plain text)

Examples

Data Endpoints

# List all tools
curl https://rundida.com/api/tools.json | jq '.tools[0]'

# Get pace calculator details
curl https://rundida.com/api/tools/pace-calculator.json | jq '.tool.faqs'

# Get upcoming marathons
curl https://rundida.com/api/marathons.json | jq '.active[0:5]'

Available Tool Slugs

Use these slugs with the /api/tools/{slug}.json endpoint:

hyrox-time-calculator

marathon-countdown

pace-calculator

pace-band-generator

race-morning-planner

heart-rate-zones

vo2max-calculator

finish-time-calculator

running-calories

race-time-predictor

splits-calculator

distance-converter

treadmill-pace

boston-qualifying

max-heart-rate

pace-speed-converter

age-grading

training-plan

race-day-checklist

what-to-wear

hydration-calculator

carb-loading

gel-calculator

taper-calculator

negative-split-planner

run-walk-planner

packing-list

training-pace

mileage-increase

training-start-date

race-equivalence

wall-predictor

heat-adjustment

cadence-calculator

interval-calculator

wind-effect

altitude-adjustment

weight-pace

weather-score

running-power

fitness-age

shoe-rotation

aqi-running

clothing-temp-guide

share-card

virtual-bib

mantra-generator

pr-prediction

recovery-planner

track-lane-distance

vdot-calculator

gap-calculator

running-economy

shoe-mileage

cross-training

lactate-threshold

running-cost

lottery-calculator

spectator-planner

running-streak

elevation-profile

running-log

steps-distance

social-post

treadmill-incline

injury-risk

training-load

return-to-running

sleep-recovery

running-bpm

gps-art

finisher-certificate

achievement-card

year-in-review

shoe-cost-mile

carbon-footprint

critical-velocity

cooper-test

electrolyte

pre-race-meal

aid-station

photo-timing

medal-tracker

interval-timer

uv-running

dew-point

marathon-finder

butter-run-calculator

hill-repeat-generator

hill-race-adjuster

course-difficulty-score

downhill-impact

hill-pacing-strategy

carbon-roi-calculator

shoe-match

running-quote-sticker

ice-cream-run-calculator

runner-bingo-card

Available Marathon IDs

missoula2026 — 2026 Missoula Marathon - Jun 28

wellington2026 — 2026 Wellington Marathon - Jun 28

hakodate2026 — 2026 Hakodate Marathon - Jun 28

tenby2026 — 2026 Wales Marathon (Tenby) - Jun 28

kona2026 — 2026 Kona Marathon - Jul 4

goldcoast2026 — 2026 Gold Coast Marathon - Jul 5

cairns2026 — 2026 Cairns Marathon - Jul 12

snowdoniatrail2026 — 2026 Snowdonia Trail Marathon Eryri - Jul 12

alicesprings2026 — 2026 Alice Springs Marathon - Jul 19

jackandjill2026 — 2026 Jack & Jill's Downhill Marathon - Jul 25

australianoutback2026 — 2026 Yulara Marathon - Jul 25

sanfrancisco2026 — 2026 San Francisco Marathon - Jul 26

taupo2026 — 2026 Taupo Marathon - Aug 1

cybicoastal2026 — 2026 Cybi Coastal Marathon - Aug 1

townsville2026 — 2026 Townsville Marathon - Aug 2

sunshinecoast2026 — 2026 Sunshine Coast Marathon - Aug 2

yukon2026 — 2026 Yukon River Trail Marathon - Aug 2

thamesmeander2026 — 2026 Thames Meander Marathon - Aug 9

isleofman2026 — 2026 Isle of Man Marathon - Aug 9

edmonton2026 — 2026 Edmonton Marathon - Aug 16

anchoragerunfest2026 — 2026 Anchorage RunFest Marathon - Aug 16

twotunnels2026 — 2026 Two Tunnels Marathon - Aug 16

reykjavik2026 — 2026 Reykjavik Marathon - Aug 22

colnevalley2026 — 2026 Colne Valley Path Marathon - Aug 23

yellowknife2026 — 2026 Yellowknife Overlander Marathon - Aug 23

sydney2026 — 2026 TCS Sydney Marathon - Aug 30

hokkaido2026 — 2026 Hokkaido Marathon - Aug 30

pocatello2026 — 2026 Pocatello Marathon - Sep 5

jungfrau2026 — 2026 Jungfrau Marathon - Sep 5

medoc2026 — 2026 Marathon du Médoc - Sep 5

kauai2026 — 2026 Kauai Marathon - Sep 6

glencoe2026 — 2026 Glencoe Marathon - Sep 6

bigcottonwood2026 — 2026 REVEL Big Cottonwood Marathon - Sep 12

causewaycoast2026 — 2026 Causeway Coast Marathon - Sep 12

oslo2026 — 2026 Oslo Marathon - Sep 12

dunedin2026 — 2026 Dunedin Marathon - Sep 13

newfoundland2026 — 2026 Newfoundland Marathon - Sep 13

erie2026 — 2026 Erie Marathon - Sep 13

regina2026 — 2026 Queen City Marathon - Sep 13

richmondrunfest2026 — 2026 Richmond RUN-FEST Marathon - Sep 13

farnhampilgrim2026 — 2026 Farnham Pilgrim Marathon - Sep 13

newforest2026 — 2026 New Forest Marathon - Sep 13

airforce2026 — 2026 Air Force Marathon - Sep 19

equinox2026 — 2026 Fairbanks Marathon - Sep 19

siouxfalls2026 — 2026 Sioux Falls Marathon - Sep 20

pikespeak2026 — 2026 Pikes Peak Marathon - Sep 20

marathondufjord2026 — 2026 Marathon du Fjord - Sep 26

jacksonhole2026 — 2026 Jackson Hole Marathon - Sep 26

dorneylake2026 — 2026 Dorney Lake Marathon - Sep 26

boulderthon2026 — 2026 Boulderthon Boulder Marathon - Sep 27

kelowna2026 — 2026 Argus Apple Marathon (Kelowna) - Sep 27

hevercastle2026 — 2026 Hever Castle Marathon - Sep 27

warsaw2026 — 2026 Warsaw Marathon - Sep 27

berlin2026 — 2026 Berlin Marathon - Sep 27

lochness2026 — 2026 Loch Ness Marathon - Sep 27

stgeorge2026 — 2026 St. George Marathon - Oct 3

milwaukeelakefront2026 — 2026 Milwaukee Lakefront Marathon - Oct 4

portland2026 — 2026 Portland Marathon - Oct 4

maine2026 — 2026 Maine Marathon - Oct 4

moncton2026 — 2026 Moncton Marathon - Oct 4

quebeccity2026 — 2026 Quebec City Marathon - Oct 4

princeedwardcounty2026 — 2026 Prince Edward County Marathon - Oct 4

ptittraindunord2026 — 2026 P'tit Train du Nord Marathon - Oct 4

twincities2026 — 2026 Twin Cities Marathon - Oct 4

lyon2026 — 2026 Lyon Marathon - Oct 4

wineglass2026 — 2026 Wineglass Marathon - Oct 4

jersey2026 — 2026 Jersey Marathon - Oct 4

mablethorpe2026 — 2026 Mablethorpe Marathon - Oct 4

iwatemorioka2026 — 2026 Iwate Morioka City Marathon - Oct 4

kielder2026 — 2026 Kielder Marathon - Oct 4

clarendon2026 — 2026 Clarendon Marathon - Oct 4

cologne2026 — 2026 Cologne Marathon - Oct 4

isleofwight2026 — 2026 Isle of Wight Marathon - Oct 4

lisbon2026 — 2026 Lisbon Marathon - Oct 10

hartford2026 — 2026 Hartford Marathon - Oct 10

suffolkcoastal2026 — 2026 Suffolk Coastal Marathon - Oct 10

longbeach2026 — 2026 Long Beach Marathon - Oct 11

perth2026 — 2026 Perth Marathon - Oct 11

melbourne2026 — 2026 Nike Melbourne Marathon - Oct 11

newportri2026 — 2026 Amica Newport Marathon - Oct 11

chicago2026 — 2026 Chicago Marathon - Oct 11

montreal2026 — 2026 Montreal Marathon - Oct 11

valleyharvest2026 — 2026 Valley Harvest Marathon - Oct 11

steamtown2026 — 2026 Steamtown Marathon - Oct 11

mohawkhudson2026 — 2026 Mohawk Hudson River Marathon - Oct 11

victoria2026 — 2026 Victoria Marathon - Oct 11

niigata2026 — 2026 Niigata City Marathon - Oct 11

chester2026 — 2026 Chester Marathon - Oct 11

chelmsford2026 — 2026 Chelmsford Marathon - Oct 11

munich2026 — 2026 Munich Marathon - Oct 11

budapest2026 — 2026 Budapest Marathon - Oct 11

kansascity2026 — 2026 Kansas City Marathon - Oct 17

baltimore2026 — 2026 Baltimore Marathon - Oct 17

dramathon2026 — 2026 Dramathon - Oct 17

langdale2026 — 2026 Langdale Marathon - Oct 17

princeedwardisland2026 — 2026 Prince Edward Island Marathon - Oct 18

detroit2026 — 2026 Detroit Free Press Marathon - Oct 18

dukecity2026 — 2026 Duke City Marathon - Oct 18

xian2026 — 2026 Xi'an Marathon - Oct 18

columbus2026 — 2026 Columbus Marathon - Oct 18

naples2026 — 2026 Naples Marathon - Oct 18

mountdesertisland2026 — 2026 Mount Desert Island Marathon - Oct 18

torontowaterfront2026 — 2026 Toronto Waterfront Marathon - Oct 18

atlanticcity2026 — 2026 Atlantic City Marathon - Oct 18

baystate2026 — 2026 Baystate Marathon - Oct 18

grandrapids2026 — 2026 Grand Rapids Marathon - Oct 18

desmoines2026 — 2026 Des Moines Marathon - Oct 18

abingdon2026 — 2026 Abingdon Marathon - Oct 18

amsterdam2026 — 2026 Amsterdam Marathon - Oct 18

antwerp2026 — 2026 Antwerp Marathon - Oct 18

ljubljana2026 — 2026 Ljubljana Marathon - Oct 18

yorkshire2026 — 2026 Yorkshire Marathon - Oct 18

edenproject2026 — 2026 Eden Project Marathon - Oct 18

northyorkmoors2026 — 2026 North York Moors Coastal Marathon - Oct 24

beachyhead2026 — 2026 Beachy Head Marathon - Oct 24

snowdonia2026 — 2026 Snowdonia Marathon Eryri - Oct 24

marinecorps2026 — 2026 Marine Corps Marathon - Oct 25

chengdu2026 — 2026 Chengdu Marathon - Oct 25

beijing2026 — 2026 Beijing Marathon - Oct/Nov (date TBA)

niagarafalls2026 — 2026 Niagara Falls Marathon

yokohama2026 — 2026 Yokohama Marathon - Oct 25

dublin2026 — 2026 Dublin Marathon - Oct 25

kanazawa2026 — 2026 Kanazawa Marathon - Oct 25

mito2026 — 2026 Mito Komon Manyu Marathon - Oct 25

shimadaoigawa2026 — 2026 Shimada Oigawa Marathon - Oct 25

venice2026 — 2026 Venice Marathon - Oct 25

frankfurt2026 — 2026 Frankfurt Marathon - Oct 25

zhengzhou2026 — 2026 Zhengzhou Marathon - Oct 31

auckland2026 — 2026 Auckland Marathon - Nov 1

twocities2026 — 2026 Two Cities Marathon - Nov 1

hangzhou2026 — 2026 Hangzhou Marathon - Nov 1

cityofoaks2026 — 2026 City of Oaks Marathon - Nov 1

hamilton2026 — 2026 Hamilton Marathon - Nov 1

shimonoseki2026 — 2026 Shimonoseki Kaikyo Marathon - Nov 1

cornish2026 — 2026 Cornish Marathon - Nov 1

toyama2026 — 2026 Toyama Marathon - Nov 1

newyork2026 — 2026 NYC Marathon - Nov 1

gunma2026 — 2026 Gunma Marathon - Nov 3

bigbear2026 — 2026 REVEL Big Bear Marathon - Nov 7

gower2026 — 2026 Gower Marathon - Nov 7

indianapolis2026 — 2026 Indianapolis Monumental Marathon - Nov 7

porto2026 — 2026 Porto Marathon - Nov 8

bordeaux2026 — 2026 Bordeaux Marathon - Nov 8

nicecannes2026 — 2026 French Riviera Marathon Nice-Cannes - Nov 8

malaga2026 — 2026 Málaga Marathon - Nov 8

okayama2026 — 2026 Okayama Marathon - Nov 8

manchesternh2026 — 2026 Manchester City Marathon - Nov 8

athens2026 — 2026 Athens Marathon - Nov 8

chibaaqualine2026 — 2026 Chiba Aqua-Line Marathon - Nov 8

richmond2026 — 2026 Richmond Marathon - Nov 14

charlotte2026 — 2026 Charlotte Marathon - Nov 14

neworleans2026 — 2026 New Orleans Marathon - Nov 14

queenstown2026 — 2026 Queenstown Marathon - Nov 14

madison2026 — 2026 Madison Marathon - Nov 15

nanjing2026 — 2026 Nanjing Marathon - Nov 15

suzhou2026 — 2026 Suzhou Marathon - Nov 15

kobe2026 — 2026 Kobe Marathon - Nov 15

spacecoast2026 — 2026 Space Coast Marathon - Nov 22

philadelphia2026 — 2026 Philadelphia Marathon - Nov 22

changsha2026 — 2026 Changsha Marathon - Nov 22

route662026 — 2026 Route 66 Marathon - Nov 22

tsukuba2026 — 2026 Tsukuba Marathon - Nov 22

sansebastian2026 — 2026 San Sebastián Marathon - Nov 22

fukuchiyama2026 — 2026 Fukuchiyama Marathon - Nov 22

otawara2026 — 2026 Otawara Marathon - Nov 23

bangkok2026 — 2026 Amazing Thailand Marathon Bangkok - Nov 29

seattle2026 — 2026 Seattle Marathon - Nov 29

florence2026 — 2026 Florence Marathon - Nov 29

turin2026 — 2026 Turin Marathon - Nov 29

larochelle2026 — 2026 La Rochelle Marathon - Nov 29

memphis2026 — 2026 St. Jude Memphis Marathon - Dec 5

jurassiccoast2026 — 2026 Jurassic Coast Marathon - Dec 5

whanganui2026 — 2026 Whanganui Marathon - Dec 6

shanghai2026 — 2026 Shanghai Marathon - Dec 6

cim2026 — 2026 California International Marathon - Dec 6

sanantonio2026 — 2026 San Antonio Marathon - Dec 6

valencia2026 — 2026 Valencia Marathon - Dec 6

naha2026 — 2026 Naha Marathon - Dec 6

shonan2026 — 2026 Shonan International Marathon - Dec 6

hofu2026 — 2026 Hofu Yomiuri Marathon - Dec 6

kiawah2026 — 2026 Kiawah Island Marathon - Dec 12

honolulu2026 — 2026 Honolulu Marathon - Dec 13

rocketcity2026 — 2026 Rocket City Marathon - Dec 13

msgulfcoast2026 — 2026 Mississippi Gulf Coast Marathon - Dec 13

tucson2026 — 2026 Tucson Marathon - Dec 13

guangzhou2026 — 2026 Guangzhou Marathon - December (date TBA)

kunming2026 — 2026 Kunming Marathon - Dec 13

dallas2026 — 2026 Dallas Marathon - Dec 13

fukuoka2026 — 2026 Fukuoka Marathon - Dec 13

aoshimataiheiyo2026 — 2026 Aoshima Taiheiyo Marathon - Dec 13

fujisan2026 — 2026 Mt. Fuji Marathon - Dec 13

nara2026 — 2026 Nara Marathon - Dec 13

taipei2026 — 2026 Taipei Marathon - Dec 20

shenzhen2026 — 2026 Shenzhen Marathon - Dec 20

portsmouthcoastal2026 — 2026 Portsmouth Coastal Marathon - Dec 20

hobart2027 — 2027 Hobart Marathon - Jan 3

lascruces2027 — 2027 State 47 Las Cruces Marathon - Jan 9

disneyworld2027 — 2027 Walt Disney World Marathon - Jan 10

xiamen2027 — 2027 Xiamen Marathon - Jan 10

ibusukinanohana2027 — 2027 Ibusuki Nanohana Marathon - Jan 10

carlsbad2027 — 2027 Carlsbad Marathon - Jan 17

houston2027 — 2027 Houston Marathon - Jan 17

louisiana2027 — 2027 Louisiana Marathon - Jan 17

ishigaki2027 — 2027 Ishigaki Island Marathon - Jan 17

miami2027 — 2027 Miami Marathon - Jan 31

katsuta2027 — 2027 Katsuta Marathon - Jan 31

surfcity2027 — 2027 Surf City Marathon - Feb 7

ehime2027 — 2027 Ehime Marathon - Feb 7

beppuoita2027 — 2027 Beppu-Oita Marathon - Feb 7

mesa2027 — 2027 Mesa Marathon - Feb 13

austin2027 — 2027 Austin Marathon - Feb 14

saitama2027 — 2027 Saitama Marathon - Feb 14

seville2027 — 2027 Seville Marathon - Feb 21

kyoto2027 — 2027 Kyoto Marathon - Feb 21

kitakyushu2027 — 2027 Kitakyushu Marathon - Feb 21

kochiryoma2027 — 2027 Kochi Ryoma Marathon - Feb 21

kumamotocastle2027 — 2027 Kumamoto Castle Marathon - Feb 21

cowtown2027 — 2027 Cowtown Marathon - Feb 28

osaka2027 — 2027 Osaka Marathon - Feb 28

myrtlebeach2027 — 2027 Myrtle Beach Marathon - Mar 6

sussexcoastal2027 — 2027 Sussex Coastal Marathon - Mar 6

newportnews2027 — 2027 Newport News One City Marathon - Mar 7

littlerock2027 — 2027 Little Rock Marathon - Mar 7

la2027 — 2027 LA Marathon - Mar 7

atlanta2027 — 2027 Atlanta Marathon - Mar 7

napavalley2027 — 2027 Napa Valley Marathon - Mar 7

kagoshima2027 — 2027 Kagoshima Marathon - Mar 7

meadows2027 — 2027 Meadows Marathon - Mar 7

tokyo2027 — 2027 Tokyo Marathon - Mar 7

tambasasayama2027 — 2027 Tamba-Sasayama ABC Marathon - Mar 7

tobaccoroad2027 — 2027 Tobacco Road Marathon - Mar 14

shizuoka2027 — 2027 Shizuoka Marathon - Mar 14

tokushima2027 — 2027 Tokushima Marathon - Mar 14

steyningstinger2027 — 2027 Steyning Stinger Marathon - Mar 14

barcelona2027 — 2027 Barcelona Marathon - Mar 14

rome2027 — 2027 Rome Marathon - Mar 14

nagoya2027 — 2027 Nagoya Women's Marathon - Mar 14

classiccity2027 — 2027 Classic City Marathon - Mar 20

chongqing2027 — 2027 Chongqing Marathon - Mar 21

shamrock2027 — 2027 Shamrock Marathon - Mar 21

ghent2027 — 2027 Ghent Marathon - Mar 21

itabashi2027 — 2027 Itabashi City Marathon - Mar 21

tottori2027 — 2027 Tottori Marathon - Mar 21

kagawa2027 — 2027 Kagawa Marathon - Mar 21

wuxi2027 — 2027 Wuxi Marathon - Mar 28

sagasakura2027 — 2027 Saga Sakura Marathon - Mar 28

mtcharleston2027 — 2027 REVEL Mt Charleston Marathon - Apr 3

milan2027 — 2027 Milan Marathon - Apr 4

brighton2027 — 2027 Brighton Marathon - Apr 4

stlouis2027 — 2027 Greater St. Louis Marathon - Apr 10

bunbury2027 — 2027 Bunbury Marathon - Apr 11

coastaldelaware2027 — 2027 Coastal Delaware Marathon - Apr 11

paris2027 — 2027 Paris Marathon - Apr 11

bostonuk2027 — 2027 Boston Marathon UK - Apr 11

rotterdam2027 — 2027 NN Marathon Rotterdam - Apr 11

bonn2027 — 2027 Bonn Marathon - Apr 11

newcastlensw2027 — 2027 Newcastle Marathon - Apr 18

mountains2beach2027 — 2027 Mountains 2 Beach Marathon - Apr 18

christchurch2027 — 2027 Christchurch Marathon - Apr 18

jerseycity2027 — 2027 Jersey City Marathon - Apr 18

ballarat2027 — 2027 Ballarat Marathon - Apr 18

manchester2027 — 2027 Manchester Marathon - Apr 18

newport2027 — 2027 Newport Wales Marathon - Apr 18

guernsey2027 — 2027 Guernsey Marathon - Apr 18

kentspring2027 — 2027 Kent Spring Marathon - Apr 18

krakow2027 — 2027 Cracovia Marathon - Apr 18

vienna2027 — 2027 Vienna City Marathon - Apr 18

norfolk2027 — 2027 Norfolk Marathon - Apr 18

kasumigaura2027 — 2027 Kasumigaura Marathon - Apr 18

boston2027 — 2027 Boston Marathon - Apr 19

olathe2027 — 2027 Garmin Olathe Marathon - Apr 24

kentuckyderby2027 — 2027 Kentucky Derby Festival Marathon - Apr 24

saltlakecity2027 — 2027 Salt Lake City Marathon - Apr 24

nashville2027 — 2027 Rock 'n' Roll Nashville Marathon - Apr 24

pembrokeshire2027 — 2027 Endurancelife Pembrokeshire Marathon - Apr 24

maui2027 — 2027 Maui Marathon - Apr 25

glasscity2027 — 2027 Glass City Marathon - Apr 25

oklahomacity2027 — 2027 Oklahoma City Memorial Marathon - Apr 25

bigsur2027 — 2027 Big Sur International Marathon - Apr 25

eugene2027 — 2027 Eugene Marathon - Apr 25

mississauga2027 — 2027 Mississauga Marathon - Apr 25

hamburg2027 — 2027 Hamburg Marathon - Apr 25

madrid2027 — 2027 Madrid Marathon - Apr 25

blackpool2027 — 2027 Blackpool Marathon - Apr 25

shakespeare2027 — 2027 Shakespeare Marathon - Apr 25

london2027 — 2027 TCS London Marathon - Apr 25

rotorua2027 — 2027 Rotorua Marathon - May 1

ocmarathon2027 — 2027 OC Marathon - May 2

flyingpig2027 — 2027 Flying Pig Marathon - May 2

fortcollins2027 — 2027 Colorado Marathon - May 2

pittsburgh2027 — 2027 Pittsburgh Marathon - May 2

lincoln2027 — 2027 Lincoln Marathon - May 2

eauclaire2027 — 2027 Eau Claire Marathon - May 2

torontospring2027 — 2027 Toronto Marathon (Spring) - May 2

avenueofthegiants2027 — 2027 Avenue of the Giants Marathon - May 2

vancouver2027 — 2027 Vancouver Marathon - May 2

belfast2027 — 2027 Belfast City Marathon - May 2

newcastle2027 — 2027 Newcastle-Gateshead Marathon - May 2

southampton2027 — 2027 Southampton Marathon - May 2

threeforts2027 — 2027 Three Forts Marathon - May 2

miltonkeynes2027 — 2027 Milton Keynes Marathon - May 3

fredericton2027 — 2027 Fredericton Marathon - May 9

leeds2027 — 2027 Leeds Marathon - May 9

halstead2027 — 2027 Halstead & Essex Marathon - May 9

ogden2027 — 2027 Ogden Marathon - May 15

hawkesbay2027 — 2027 Napier Marathon - May 15

whitepeak2027 — 2027 White Peak Marathon - May 15

denver2027 — 2027 Denver Colfax Marathon - May 16

cleveland2027 — 2027 Cleveland Marathon - May 16

sugarloaf2027 — 2027 Sugarloaf Marathon - May 16

reddeer2027 — 2027 Red Deer Marathon - May 16

worcester2027 — 2027 Worcester Marathon - May 16

noosa2027 — 2027 Noosa Heads Marathon - May 22

fargo2027 — 2027 Fargo Marathon - May 22

bluenose2027 — 2027 Blue Nose Marathon - May 23

bayshore2027 — 2027 Bayshore Marathon - May 29

stockholm2027 — 2027 Stockholm Marathon - May 29

buffalo2027 — 2027 Buffalo Marathon - May 30

ottawa2027 — 2027 Ottawa Marathon - May 30

vermontcity2027 — 2027 Vermont City Marathon - May 30

edinburgh2027 — 2027 Edinburgh Marathon - May 30

deadwood2027 — 2027 Deadwood-Mickelson Trail Marathon - Jun 6

coniston2027 — 2027 Lakeland Trails Coniston Marathon - Jun 6

greatwelsh2027 — 2027 Great Welsh Marathon - Oct 17

OpenAPI Specification

Machine-readable API documentation in OpenAPI 3.0 format:

https://rundida.com/api/openapi.json

MCP Server for AI Agents

RunDida provides an MCP (Model Context Protocol) server for direct AI agent integration:

# Install
npm install @rundida/mcp-server

# Add to Claude Desktop config
{
  "mcpServers": {
    "rundida": {
      "command": "npx",
      "args": ["@rundida/mcp-server"]
    }
  }
}

Available MCP tools:

list_tools — browse all 98 running calculators
get_tool — get details for a specific tool
list_marathons — list all marathon events
get_marathon — get marathon details and countdown
calculate_pace — pace/time/distance calculations
predict_race — predict finish times from a known result
heart_rate_zones — calculate training HR zones
marathon_countdown — days until a specific marathon

For AI Agents

If you're building an AI agent that needs running data:

Start with /llms.txt for a machine-readable overview of all available resources
Use the MCP server above for direct tool integration with Claude and other MCP-compatible agents
Use /api/tools.json to discover available calculators
Use /api/marathons.json for race event data
Use /api/openapi.json for the OpenAPI specification
All pages include Schema.org structured data (WebApplication, FAQPage, SportsEvent)

Terms of Use

Free for personal and commercial use
No API key required
Please include attribution when displaying RunDida data
Data is regenerated at each site build — cache responses for at least 1 hour
For high-volume usage, please reach out on GitHub