Docs

Live in PhiladelphiaVote for the next city

What's happening nearby, verified.

An API of family events, classes, camps and places for agents and apps. Read from the source, re-checked before the date.

Read the docs Open the playground
GET /v1/philadelphia/events?age=4&free=true&limit=3 Sends a sample request and shows a sample response
Sample response

Press Run to send a sample request.

Sample data. Venues and organizers are made up; the fields are the real API's.

Run a studio, venue or rec program? Meet Spaces

Who it's for

For builders, and the businesses they help people find.

If your software answers "what can we do nearby?", Tailend is the local layer under it. If you're a place being found, Spaces shows what they see.

A person looks at their phone; a speech bubble shows a small row home with one warm lit window. agents · assistants

AI agents and assistants

Local answers your agent can cite, each with when it was last confirmed.

Read the OpenAPI spec
A desk calendar with one day circled and a pencil beside it. apps · products

Apps and local guides

Calendars and guides on one typed shape. Sync only what changed.

See what's built with it
A small studio storefront with an awning and an owner leaning in the open doorway. local businesses

Studios, venues and rec programs

What assistants and apps see about you, and the space around you.

Meet Spaces

The problem

Local data is the hard part.

Anyone who has built "what can we do nearby?" has hit these four walls.

The long tail gets lost

Big platforms surface the same famous places. The small ones, often the best, never make it in.

46% of the organizers we cover publish five listings or fewer.

A row of doors getting smaller, the last tiny one lit warm from inside.
A door with three different notices taped at odd angles.

It's messy

Flyers, calendar widgets, booking pages. Everyone publishes their own way.

1,379sources in one city

Reading glasses resting on a crumpled flyer beside a small stack of coins.

Reading it right is costly

A model reading every messy page, every time, and still needing a check.

6,500+listings, each read from its source

A desk calendar with one day crossed out and an arrow moving it to the next day.

It changes near the date

Times move and sessions fill. Last month's check won't do this week.

98%of one-time events in the next 48h re-checked in the last day

How it works

Confirmed at the source, or not served.

An agent that recommends a cancelled class is worse than one that says nothing. Here's one listing, start to finish.

Read from the source, once

Flyers, calendar widgets and feeds, read where the organizer posts them and turned into one typed shape.

Example: a hand-made flyer that says "Sunshine Story Hour, Sat the 17th, 10:30ish, little ones 2 to 5, $5 at the door, Pine Hollow rec ctr" becomes one listing with a local start time, age_min 2 and age_max 5 as numbers, a price of 5 in USD, a place, and a verified_at time.

A sample listing; the venue is made up.

Re-checked as the date gets close

The nearer the day, the more often it's confirmed.

A timeline from the day a listing appears to the day of the event. Confirmations get closer together as the day approaches, and the listing's verified_at moves forward each time.

Every listing carries verified_at.

Withheld until confirmed

Source gone quiet? It leaves your results until it's confirmed again.

A listing card whose source stops answering. It greys out and is withheld from results, then returns once the source confirms it again, with a new verified_at.

Your agent never repeats something stale.

Build it yourself, or don't

What you'd be signing up for.

Local data looks like a weekend scraper. It turns into a standing job.

Build it yourself

  1. Sourcesfind and track every organizer's page
  2. Interpretationparse flyers, widgets and feeds
  3. Keeping currentre-check every listing near its date
  4. The long tailchase the small studios big lists skip

With Tailend

GET /v1/philadelphia/events

One request. Already read, interpreted and re-checked, with verified_at on every listing.

Coverage

Fresh where it matters, deep where others stop.

Measured on the live Philadelphia catalogue, November 6, 2026. More cities open as demand builds. Vote for yours.

Freshness

98%

of one-time events in the next 48 hours were re-checked against their source in the last 24 hours.

Next 48 hours98% within a day
Next 7 days92% within a week

Half of the next 48 hours' one-time events were last checked about eight hours ago.

Active listings

6,500+

  • Events 3,184
  • Classes 2,257
  • Places 1,107
  • Camps 24 growing

Long tail

51%

of organizers have five or fewer active listings.

0listings re-read from their source today
2,907upcoming events, each with a date and a place
108neighborhoods covered
Philadelphialive now. Vote for the next city

The API

Built for software that has to be right on Saturday.

Four kinds of listing in one typed shape, each with its history: what changed, how busy a corner is, where things are heading.

/versions · /changes

Every change, kept

Moved times, new prices, cancellations: all recorded. Sync a city with changed_since instead of re-downloading.

GET /v1/philadelphia/changes?changed_since=2026-10-16T09:00:00-04:00

  1. Sunshine Story Hourstarts_at 10:00 → 10:30
  2. Toddler Open Gymprice $8 → $10
  3. Pumpkin Patch Walkstatus → cancelled
  4. Fall Pottery for Kidsnew listing
  5. Library Lego Clubage_min 6 → 5

Sample changes; the listings are made up.

/activity

How lively is this block?

One comparable score for any address, with its reasons and the listings nearby.

/events/calendar

Busy days at a glance

Daily counts, how many are free, and the category mix. Counts match the lists.

trends · forecastsEarly access

Where demand is heading

What fills up early, season by season. Ask for early access.

events · classes · camps · places

Four kinds of listing, plus the organizations behind them.

?age=4&free=true

Real filters: age, free or paid, neighborhood, category, keyword.

occurrences=expand

Recurring series, either way: one row per series, or per session.

openapi.json

Made for agents: an OpenAPI spec, plain errors and an llms.txt.

Use cases

What people build with it.

Family assistants

Answer "what can we do Saturday?" with real, current options.

Ages as numbersFree/paid filterTimes in local time

See the full guide

what can we do Saturday morning with a 3-year-old? under $15

Three on Saturday, Oct 17, all under $15:

  • Sensory Jump9:00 AM · Funzilla · $12 · ages 1–3
  • Stories of Science10:00 AM · Science History Institute · free
  • Read, Baby, Read Baby Storytime11:00 AM · Free Library, Cottman Ave · free · ages 0–4

Sources: organizers' pages

GET/v1/philadelphia/events?from=2026-10-17&to=2026-10-17&age=3&max_price=15&start_before=12:00&occurrences=expandSample shown
The TinyJawns calendar in week view for October 12 to 18: all-day and timed family events by hour, with weather for each day and Free badges. TinyJawns weeklyMid-Autumn Moved to Saturday, Plus a Sound Bath and Castanets The TinyJawns weekly issue for October 3, opening with the Mid-Autumn Festival in Chinatown.
The TinyJawns calendar and weekly newsletter, built from Tailend listings.
CustomerPhiladelphia's family guidePowered by tailend

Built with Tailend

TinyJawns runs on it. It's where Tailend started.

TinyJawns is a family guide for Philadelphia. Every listing on it comes through the Tailend API.

TinyJawns hit every problem above, so we built Tailend to solve them once.

Visit tinyjawns.com

Spaces by Tailend

Waitlist

For studios, venues and rec programs

Find the open space in your local market.

See what assistants and apps see about your business, and the open space around it.

  • See how you show up. What apps and assistants see about you.
  • Check an idea. Is there room, and who runs it?
  • Price it. What nearby programs charge, against your price.
Join the Spaces waitlist

Invite-only pilot in Philadelphia. We'll let you in as it opens up.

A sample idea check. Real checks use live listings near your address.

Pricing

Pay for what you use.

Free

$0

2,000 credits to build and test. No card needed.

  • Up to 500 credits a day for 60 days
  • 1 key, 30 requests a minute
  • Every base endpoint
Start building for free

Pay as you go

$1 per 1,000 credits

Prepaid from $10. Credits never expire.

  • 1 credit = 1 record returned
  • Empty results, errors and 304s are free
  • Optional credit limits per key
  • 10 keys, 300 requests a minute
Get an API key

Sync

$199 per city / month

Keep your own copy current.

  • 100,000 credits a month
  • Change feed and bulk export
  • 7-day caching
Ask about Sync

Bigger needs

Talk to us

New cities, higher volume or partner rights.

  • Limits agreed per account
  • Help integrating
Talk to us

Launch pricing; data-use terms are published before launch. Access is by request for now; we'll email you when self-serve sign-up opens. See full pricing and add-ons →

Request a city

Your city, and what you're building.

Tell us the city and what it's for. Cities open as demand builds, and this counts as your vote. It also joins the Spaces waitlist.

Philadelphia Live More cities Vote for yours

I'm interested in

An agent, an app, a guide, or the business you run. A sentence or two is plenty.

We'll only use your email to reply about this request.

Give your agent the neighborhood.

Try sample responses in the playground with no key, then get your own key from the quickstart.

Try the playground Read the docs
A line drawing of a quiet neighborhood street with row-house shops and studio doors. A parent and child walk hand in hand toward the smallest doorway at the far end, which has a single green flyer taped to it.